List of X-Men: The Animated Series and X-Men '97 characters

For the series starting in 2000, see List of X-Men: Evolution characters.

The logos of X-Men: The Animated Series and X-Men '97

This is a list of characters from the animated series X-Men (1992–1997) and its revival X-Men '97 (2024–present).

Cast and characters

List indicators

This section includes main cast members, recurring characters, and notable guest stars.

• An empty, dark grey cell indicates the character was not in the television series.
•  ^Y indicates a younger version of the character.

Main cast and characters of X-Men: The Animated Series and X-Men '97

Character	X-Men: The Animated Series					X-Men '97
	Season 1 (1992–1993)	Season 2 (1993–1994)	Season 3 (1994–1995)	Season 4 (1995–1996)	Season 5 (1996–1997)	Season 1 (2024)
Cyclops Scott Summers	Norm Spencer					Ray Chase
Wolverine Logan	Cathal J. Dodd
Rogue	Lenore Zann
Storm Ororo Munroe	Iona Morris	Alison Sealy-Smith
Beast Dr. Henry "Hank" McCoy	George Buza
Gambit Remy Lebeau	Chris Potter				Chris Potter Tony Daniels	A.J. LoCascio
Jubilee Jubilation Lee	Alyson Court					Holly Chou
Jean Grey Madelyne Pryor	Catherine Disher					Jennifer Hale
Professor X Charles Xavier	Cedric Smith					Ross Marquand
Magneto Erik "Magnus" Lensherr	David Hemblen		—	David Hemblen		Matthew Waterson
Forge Daniel Lone Eagle	Marc Strange					Gil Birmingham
Henry Peter Gyrich	Barry Flatman	—		Barry Flatman		Todd Haberkorn
Lucas Bishop	Philip Akin		—	Philip Akin	—	Isaac Robinson-Smith
Apocalypse En Sabah Nur	John Colicos		James Blendick			Ross Marquand Adetokumboh M'CormackY
Mister Sinister Dr. Nathaniel Essex	Christopher Britton		—	Christopher Britton
Morph	Ron Rubin		—	Ron Rubin		J. P. Karliak
Robert Kelly	Len Carlson		—	Len Carlson		Ron Rubin
Cable Nathan Summers	Lawrence Bayne		—	Lawrence Bayne	—	Chris Potter
Moira MacTaggert	Lally Cadeau	—	Fiona Reid	Eve Crawford	Fiona Reid	Martha Marion
Banshee Sean Cassidy	—		Philip Williams			David Errigo Jr.
Callisto	Jennifer Dale	—	Jennifer Dale		—	Courtenay Taylor
Leech	Ron Rubin	—	Ron Rubin		—	David Errigo Jr.
Bolivar Trask	Dan Hennessey	—		Dan Hennessey	—	Gavin Hammon
Sentinels	David Fox	—		Barry Flatman	—	Eric Bauza
Master Mold		—		Nigel Bennett	—
Mojo	—	Peter Wildman	—		Peter Wildman	David Errigo Jr.
Spiral	—	Cynthia Belliveau	—		Cynthia Belliveau	Abby Trott
Nightcrawler Kurt Wagner	—		Adrian Hough	—	Adrian Hough
Lilandra Neramani	—		Kristina Nicoll			Morla Gorrondonna
Gladiator Kallark	—		Richard Epcar	Raymond O'Neil	—	David Errigo Jr.
Sebastian Shaw	—		David Bryant	—		Travis Willingham
Emma Frost	—		Cynthia Dale	—		Martha Marion
X-Cutioner Carl Denti	—					Lawrence Bayne
Abscissa	—					Alyson Court
Valerie Cooper	—					Catherine Disher
Sunspot Roberto da Costa	—					Gui Agustini
Bastion Sebastion Gilberti	—					Theo James

Hero teams

X-Men

• Cyclops / Scott Summers (voiced by Norm Spencer in the original series, Ray Chase in the revival series) – The field commander of the X-Men, who is shown to be in his late twenties. He is generally aloof and has occasionally expressed doubts about his leadership. He is in a relationship with Jean Grey throughout the series before eventually marrying her. His eyes can emit powerful beams of light energy, which he controls by either closing his eyes or hiding them behind ruby-quartz crystals, usually in the form of sunglasses. In the revival series, Cyclops is still in a relationship with Jean and starts to be friendly towards Madelyne Pryor due to Mister Sinister switching the two.
• Wolverine / Logan (voiced by Cathal J. Dodd in both series) – He remembers little of his past, and while he never kills opponents, it is implied that he would if the other X-Men did not hold him back. He is also in love with Jean, which, along with Cyclops's decision to leave Morph and Beast behind following a Sentinel attack, causes him to resent Cyclops. He possesses a regenerative healing power and heightened senses, along with claws and an adamantium endoskeleton, which are not part of his mutant abilities. In the revival series, Wolverine helps in the fight against the Prime Sentinels. He is part of the X-Men's Blue Team that goes to confront Magneto on Asteroid M. After Wolverine wounds Magneto, he proceeds to rip the Adamantium off of Wolverine's bones.
• Rogue (voiced by Lenore Zann in both series) – She is shown to be in her mid-twenties and speaks with a Southern accent. She has the power to draw out a human's energy from a touch, allowing her to absorb their psyche, skills, and powers for a duration. This can cause unconsciousness and, in some cases, comas. She also has the powers of super strength, invulnerability, and flight, which she gained from Ms. Marvel after draining most of her energy, causing her to fall into a coma and gain her powers permanently. Like in the comics, she previously put her boyfriend, Cody, in a coma when her powers manifested during their first kiss. Despite reciprocating Gambit's feelings for her, she pushes him away out of fear of harming him. She was the adoptive daughter of Mystique, having been taken in when she ran away from home after her father rejected her for being a mutant.
• Storm / Ororo Munroe (voiced by Iona Morris in 1992–1993 of the original series, Alison Sealy-Smith in 1993–1997 of the original series and the revival) – A member of the X-Men who was orphaned at an early age and spent her childhood living on the streets, often stealing to survive. Early on in the series, she defeats Callisto to become the leader of the Morlocks, but later gives the position back to her. She is capable of controlling weather and can fly through bursts of wind. Like her comic counterpart, Storm is claustrophobic. In the revival series, Storm loses her powers when X-Cutioner uses a special weapon that depowered her when it was meant to be used on Magneto. Storm regains her abilities when fighting Adversary.
• Beast / Henry "Hank" McCoy (voiced by George Buza in both series) – A member of the X-Men who is kindhearted and highly intelligent; however, as shown in "Beauty and the Beast", he can be aggressive to protect those he loves, as he falls in love with a blind patient he is treating and goes to rescue her after the Friends of Humanity kidnap her. He has the powers of agility and super strength; following an experiment to remove his powers, he grew blue fur and his body mutated to resemble a blue ape with claws. In the revival series, Beast analyzes Storm after she was hit by a depowering weapon that X-Cutioner used.
• Gambit / Remy Lebeau (voiced by Chris Potter in 1992–1996 of the original series, Tony Daniels in 1997 of the original series, A.J. LoCascio in the revival series) – He is originally from New Orleans and speaks with a thick Cajun accent and is shown to be in his late twenties. In the past, he was affiliated with the civil war between thieves and assassins. Over time, he and Rogue's relationship develops into a more mature, loving one. While he is shown to have a cocky personality, he is also shown to have a strong sense of honor and loyalty to those he considers family, especially the X-Men. This is shown in episodes such as "Sanctuary (part 2)," when he sacrifices himself so the others can escape, and "X-ternally Yours," when he passes up the chance to wipe out the Assassins Guild and chooses the X-Men over the ties he has to either guild. He has the power to charge objects with kinetic energy which become explosive when thrown. His strength and agility possibly come from this, as he can charge himself with energy. In the revival series, Gambit is still in a relationship with Rogue. He is killed in the episode "Remember It" when he sacrifices himself to save Genosha from the upgraded Master Mold's attack, which leaves Rogue heartbroken.
• Jubilee / Jubilation Lee (voiced by Alyson Court in the original series, Holly Chou in the revival series) – The youngest of the X-Men, who was previously an orphan sent to many foster homes. In the first episode, she is captured by the Mutant Control Agency as bait to draw out the X-Men but is rescued. She is carefree and wants to be seen as an adult by others, but the team appreciates her involvement. She has the power to create pyrokinetic sparks from her hands, which she can use to attack from a distance or disable machinery. In the revival series, Jubilee is briefly trapped in Mojo's Motendo as she is aided by its character Abscissa.
• Jean Grey (voiced by Catherine Disher in the original series, Jennifer Hale in the revival series) – The heart and soul of the X-Men, who usually is at Professor X's side to aid him. Unlike most adaptations, she is depicted as being his first student. Her costume is largely the same as the one she wore in Uncanny X-Men #281 when she joined Storm's Gold Team, although her hair is tied back rather than worn loose. Throughout the series, she and Scott's relationship is explored in more depth and she takes on a central role in the "Phoenix Saga." She has the power of telekinesis and minor telepathic skills similar to Professor X. After the Phoenix possesses her, her powers are expanded, but eventually turn evil when it refuses to leave the sensation of being in a human body. In the revival series, Jean is briefly swapped with Madelyne Pryor by Mister Sinister.
• Professor X / Charles Xavier (voiced by Cedric Smith in the original series, Ross Marquand in the revival series) – The founder of the X-Men. Unlike in the comics, "Sanctuary" shows that he lost the use of his legs "battling Magneto" (which later happened in the Ultimate Marvel reality) and he uses a yellow hover-chair instead of a wheelchair. His dark side briefly manifests during the "Phoenix Saga". He possesses powerful telepathic abilities, allowing him to see people's minds or control their thoughts or actions. After Professor X is hit by a sonic device used by Henry Peter Gyrich in "Graduation Day", this puts him in a dying state where Magneto is persuaded to help him contact Lilandra Neramani. She came to Earth and took Professor X to the Shi'ar Empire to be healed by their technology. In the revival series, Professor X's will had him placing Magneto in charge of the X-Men. After fully recovering and assisting in the Kree-Shi'ar War, Professor X was to be wed to Lilandra. When Deathbird and the Imperial Guard retaliate when Professor X doesn't want to have his past erased, he takes them to the Astral Plane to teach them about co-existence. After a vision about the Wild Sentinel attacking Genosha, Professor X declines the wedding plans and asks to be taken back to Earth immediately.
• Morph (voiced by Ron Rubin in the original series, J.P. Karliak in the revival series) – A member of the X-Men and a close friend of Wolverine who was seemingly killed by the Sentinels. He reappears as a recurring villain in the second season, which reveals that Mister Sinister saved and brainwashed him. Although Professor X can free him from brainwashing, he is briefly incapacitated as he recovers. He later appears in the episode "Courage," and in the series finale, "Graduation Day," where he briefly appears as Professor X is dying from illness. He has the power to shape-shift into any form that he comes across, which includes humans as well as non-human species and animals. In the revival series, Morph is still with the X-Men as he sports a white hairless head as his true head and considers himself non-binary. Though he was still bothered by what Mister Sinister did to him.
• Bishop / Lucas Bishop (voiced by Philip Akin in the original series, Isaac Robinson-Smith in the revival series) – Bishop was originally a "tracker," a mutant collaborating with the Sentinels hunting down members of the Resistance until he was deemed unnecessary and marked for extermination, which prompted him to join the Resistance. He travels back in time to stop the assassination of Senator Kelly and prevent the "Days of Future Past" timeline from occurring (with Bishop assuming Kate Pryde's role from the comic version of this tale). While he succeeds in saving Kelly, in his timeline there is no recollection of the X-Men as they have all died. Later, he returns to stop the spread of Apocalypse's techno-organic virus; however, he also faces resistance from Cable, who knows the virus is necessary as it will also lead to the salvation of mutant-kind. He also shows up in some more episodes, where he and his sister travel back in time to stop Fitzroy from killing Xavier in the past, causing a constant war between mutants and humans in the X-Men's time, and his time changes into one in which the few surviving mutants are known only as slaves to Master Mold. They eventually manage to save Xavier, but Bishop gets trapped in the Axis of Time when Apocalypse throws him out of time. He eventually saves the entire timeline when he accidentally begins to free the psychics in the "Beyond Good and Evil" arc. In the revival series, he has joined the X-Men. After a baby Nathan Summers is infected by Mister Sinister, Bishop takes him into the future to be cured.
• Magneto / Erik Magnus Lensherr (voiced by David Hemblen in the original series, Matthew Waterson in the revival series, Victor A. Young in "Family Ties" and "Beyond Good and Evil" Pt. 2–4) – In the series, Magneto first appears in the third and fourth episodes as an antagonist where he launches nuclear missiles, but the X-Men stop it. Then he seeks to destroy a factory, but the X-Men stop him again. In the first season's finale, he helps the X-Men defeat the Master Mold and the Sentinels. He appears in nearly every episode in the second season, in which he and Professor Xavier are powerless and travel throughout the Savage Land. At the end of that season, the X-Men save them from Mr. Sinister, and they regain their powers. In the fourth season, he allies with Apocalypse but turns on him after discovering his true agenda and aids the X-Men in defeating him. Later, he constructs Asteroid M as a haven for mutants, but his dream is ruined by the fanatical Fabian Cortez. Broken, he secludes himself in the Arctic and does not care about the possible destruction of life on Earth until he receives news from Beast, Forge, Mr. Sinister, and Amelia Voght that the Phalanx has kidnapped his son, Quicksilver, in the second part of the two-part, fifth-season premiere. He teams up with them to defeat the Phalanx and saves everyone he has captured. By the end of the series, he has gathered up an entire army of rebellious mutants only to receive news from Wolverine, Cyclops, and Jean Grey that Professor X is dying. In the revival series, Professor X's will was that Magneto runs the X-Men in his absence. After being pardoned for his crimes at the United Nations, Magneto accompanied Gambit and Rogue to Genosha at the time when it was suggested to be declared its nation. When a Wild Sentinel attacked, Magneto was believed to be killed, though it was later revealed that he survived with Bastion holding him prisoner. After Val Cooper frees Magneto, he escapes to the Arctic where he unleashes a powerful planet-wide EMP that disables all the Prime Sentinels and electronics throughout the Earth, which Wolverine quickly determines is his way to declare war on humanity. Magneto retreats to Asteroid M where Cyclops' Blue Team confronted him. After being wounded by Wolverine, Magneto rips the Adamantium off his bones.
• Nightcrawler / Kurt Wagner (voiced by Adrian Hough in both series) – Nightcrawler only made guest appearances in the episodes "Nightcrawler" and "Bloodlines" and never joined the X-Men. He was shown first in an episode that featured him as a monk in a Swiss abbey, persecuted by one of his superiors and the townspeople who believed him to be a demon. Gambit, Rogue, and Wolverine helped him through his trials. The second episode reveals his origins as the birth son of Mystique, discovered by his foster-sister Rogue. In the end, after a discussion with Rogue, Mystique seemingly dies to save both of them from Graydon Creed (though secretly survives). In the revival series, he appears in the episode "Remember It" where he travels to the mutant nation Genosha and meets up with Gambit, Magneto, and Rogue. After the Wild Sentinel attack caused by Mister Sinister, Nightcrawler joins the X-Men.
• Sunspot / Roberto da Costa (voiced by Gui Agustini) – Da Costa first appears in "To Me, My X-Men", the revival series' premiere episode. He is the second newest recruit of the X-Men with the mutant ability to channel large concentrations of solar energy. His character arc is similar to that of Jubilee when she first joined the team, and they develop a close relationship.

X-Factor

X-Factor are a group of mutants who serve the U.S. government. They appear in the episodes "Cold Comfort" and "Sanctuary".

• Forge / Daniel Lone Eagle (voiced by Marc Strange in the original series, Gil Birmingham in the revival series) – Forge guest-starred in a few episodes. He is unique in that he has two separate roles in the show: in the present, he is the leader of the government-run X-Factor team; and in the future, he leads the mutant team called Xavier's Security Enforcers, who battle the Sentinels. In X-Men '97, Forge creates power-negating weapons, but works with Storm to help her regain her powers when she is affected by the weapon.
• Polaris / Lorna Dane (voiced by Mary Long) – Polaris appears in the episode "Cold Comfort" as a member of X-Factor. Polaris had been a member of the X-Men alongside her boyfriend, Iceman, though they eventually left to pursue a normal life. However, Polaris left Iceman and became a member of X-Factor and fell in love with Havok which she later admitted to Iceman following the X-Men's fight with X-Factor. She was later featured in the second part of the episode "Phalanx Covenant," in which she aided Beast, Magneto, Forge, Warlock, and Amelia Voght in their battle with the extraterrestrial Phalanx Empire. She can manipulate electromagnetism allowing her to fly, create force fields, project concussive blasts, and manipulate ferrous materials.
• Havok / Alex Summers – Havok guest-starred in the episode "Cold Comfort" as a member of X-Factor and was revealed to be romantically involved with Iceman's ex-girlfriend Lorna Dane. In the episode, X-Factor fights against the X-Men for a "friendly skirmish," as Forge puts it. It is never openly stated in the animated series that Cyclops and Havok are brothers, though Alex's existence is revealed in flashbacks. When the two meet they develop an instant rivalry and neither brother's powers affect the other; a fact which is also seen in the comics. Havok is also seen in Season 1's Days of Future Past Part 2 when Bishop tells the X-Men what will happen in the future. He can metabolize cosmic radiation and discharge it as energy blasts from his arms.
• Multiple Man / James Madrox (voiced by Tom Harvey) – Multiple Man appeared in the episode "Cold Comfort" as a member of X-Factor. He can perform self-duplication by absorbing kinetic energy. In the revival series, he appears in the episode "Remember It" where he travels to the mutant nation Genosha.
• Quicksilver / Pietro Maximoff (voiced by Paul Haddad) – Quicksilver is a super-fast mutant who guest-starred in a couple of episodes. His most noticeable appearance is in the story, "Family Ties" (season 4), where along with his sister, the Scarlet Witch, they look for their long-lost father and discover that he is Magneto.
• Strong Guy / Guido Carosella (voiced by Adrian Hough in the revival series) – Strong Guy appears in the episode "Cold Comfort" as a member of X-Factor who can rechannel kinetic energy into physical strength. In the revival series, Strong Guy appears in the episode "Bright Eyes" assisting in the relief of Genosha following the aftermath of the Wild Sentinel attack on Genosha while also taking the time to warn Sunspot that there's a war coming at the time when he attended Gambit's funeral.
• Wolfsbane / Rahne Sinclair – Wolfsbane appears in the episode "Cold Comfort" as a member of X-Factor who can morph into a werewolf-like creature.

Alpha Flight

Alpha Flight was seen in the episode "Repo Man." Vindicator (who had renamed himself Guardian in the comics) and the Canadian Alpha Flight capture Wolverine. The Canadian government demands their project back. Either he joins their team as originally planned or they repossess his indestructible, adamantium skeleton.

• Vindicator / James MacDonald Hudson (voiced by Barry Flatman) – Alpha Flight's leader. His powered suit allows him to fly, fire energy blasts, and create a personal force field.
• Shaman / Michael Twoyoungmen (voiced by Don Francks) – A member of Alpha Flight.
• Puck / Eugene Milton Judd (voiced by Don Francks) – A short member of Alpha Flight with super-strength, agility, reflexes, and durability.
• Snowbird / Narya – A member of Alpha Flight with Flight and the ability to morph into Arctic creatures.
• Northstar / Jean-Paul Beaubier (voiced by Rene Lemieux) – A member of Alpha Flight who can fly and generate a flash of blinding light which he can share when slapping hands with his sister Aurora. Northstar appeared in the episodes "Slave Island" and "Repo Man." Though he didn't have any speaking role in "Slave Island," the episode "Repo Man" proved to hold to the character's origins as his trademark French Canadian accent was present. In "Slave Island" Jean-Paul was a hostage/prisoner of the island nation of Genosha. He, along with many other mutants, provided slave labor for the government using their mutant skills for such tasks as building dams and the like. They wore special collars that restricted them from using their powers to escape and slept in prison-like cells. They eventually escaped Genosha with the help of the X-Men. In "Repo Man," Northstar is shown as part of the Canadian special forces team Alpha Flight, which tries to convince former member Wolverine to re-join.
• Aurora / Jeanne Marie Beaubier (voiced by Jennifer Dale) – A member of Alpha Flight who shares Northstar's powers when they slap hands. Aurora appeared in the episodes "Slave Island" and "Repo Man."
• Sasquatch / Dr. Walter Langowski (voiced by Harvey Atkin) – A scientific genius and member of Alpha Flight. He is a massive Bigfoot-like creature with superhuman strength, healing factor, sharp claws, and teeth.
• Dr. Heather Hudson (voiced by Rebecca Jenkins) – A scientist and member of Alpha Flight who is the wife of James Hudson

Xavier's Security Enforcers and The Resistance (in Bishop's future)

• Forge – This aged version of Forge leads Xavier's Security Enforcers, a team that resists the Sentinels in the "Days of Future Past" timeline, alongside Wolverine, Bishop, and Shard. In the altered timeline, created when Fitzroy murdered Professor X, Forge is a servant of Master Mold, having been transformed into a cyborg like his counterpart in the Age of Apocalypse.
• Wolverine – This aged version of Wolverine is also a member of the Resistance.
• Shard / Shard Bishop (voiced by Sandi Ross in the original series, Kimberly Woods in the revival series) – Shard is seen in the "Beyond Good and Evil" storyline when Bishop is sucked back into the time-portal and trapped in the Axis of Time. Shard comes back to the present to find her brother; however, when she gets to the present, she sees Mr. Sinister trying to kidnap Professor X, so she stops him. Then she asks the X-Men for help in finding her brother.
• Malcolm and Randall are shown as members in Shard's video recordings.

Clan Chosen (in Cable's future)

• Cable / Nathan Charles Summers (voiced by Lawrence Bayne in the original series, Chris Potter in the revival series) – Cable's first two appearances were in "Slave Island" and "The Cure." There was no explanation or backstory given for how he time-traveled into the past, although his mission involved stopping the production of collars that could inhibit mutant powers. Later, he appeared in the two-part episode "Time Fugitives," where Cable travels back in time to stop Bishop from preventing the outbreak of Apocalypse's techno-virus. "Time Fugitives" and "Beyond Good and Evil" established Cable's back story as waging a war along with his comrades, Clan Chosen, against Apocalypse, as well as the New Canaanite government, in a dystopian future. In X-Men '97, he is revealed to be the son of Cyclops and Jean Grey, and is born in the present day before being transported to the future after Mister Sinister infects him with a techno-organic virus.
• Genesis / Tyler Dayspring (voiced by Stuart Stone as a child) – Genesis is Cable's son. He appears as a child in "Time Fugitives," when Cable's timeline starts restoring itself, so Cable goes back in time to stop Bishop from preventing the plague. Later he appeared as a young adult in "Beyond Good and Evil," when the Clan Chosen went to destroy Apocalypse's Lazarus Chamber in 3999 A.D.
• Hope, Dawnsilk, Boak, and Garrison Kane were also shown as Clan Chosen members, but only Hope had a speaking part. They appeared in cameos working alongside Cable and Tyler.

X-Terminators (unnamed)

See also: X-Terminators

• Rusty, Skids, Boom-Boom, and Wiz-Kid were featured as orphans in the episode "No Mutant is an Island". The episode mostly focused on Cyclops and Rusty. In the episode, Cyclops, still in mourning after Jean Grey's "death," quits the X-Men and returns to his orphanage home in Nebraska. A man known as Killgrave offered to help and adopted the orphans seemingly out of charity. In reality, Killgrave, a mutant himself with telepathic abilities, wanted to use the children to make them his army to destroy all humans in the world so that mutants are accepted. Killgrave brainwashes the four and uses them to storm the governor's mansion so he can make the governor his mind-controlled slave. Scott was able to snap Rusty and the others out of Killgrave's hypnotic brainwashing in the end and save the mutant children. Later, Cyclops returns to the mansion and he and the other X-Men discover that Jean Grey has not perished after all.

Guest allies

• President Robert Kelly (voiced by Len Carlson in the original series, Ron Rubin in the revival series) – Robert Kelly ran for president on an anti-mutant campaign during the beginning of the show's first season. Kelly came to befriend the X-Men and support mutants shortly after he is elected president in the season's final episode after the X-Men had rescued him from both an assassination attempt by Mystique and an attempted brainwashing by Master Mold. In the first episode of season two, Kelly took office as president, spoke out in support of mutants, and made his first presidential act an official pardoning of Beast, who had been unfairly arrested early in season one. These actions led Kelly's former, anti-mutant supporters to feel betrayed by him and create the public anti-mutant backlash that pervaded the entire second season of the show. In the third through fifth seasons of the series, President Kelly had a low profile. He remained friendly with the X-Men through the show's end, working with them to confront global mutant threats such as Magneto building an armed, inhabitable, mutants-only asteroid in space during the fourth season.
• Angel / Archangel / Warren Worthington III (voiced by Stephen Ouimette) – Archangel's origin was retold in the series, where Apocalypse creates the Four Horsemen of the Apocalypse. Angel goes to a scientist who claims he can "cure" mutants, but it is Mystique, a servant of Apocalypse, who turns him into Death. Angel also makes a cameo appearance in the "Beyond Good and Evil" four-part episode, and as one of the original X-Men in two flashbacks. In this version, he overcomes the Death persona to become Archangel thanks to Rogue, who saps the evil that lay within him when she touches him. In the revival series, he appears in the episode "Remember It", having traveled to the mutant nation Genosha.
• Iceman / Bobby Drake (voiced by Jesse Collins) – Bobby Drake appeared as a former member of the team, who quit due to disagreements with Xavier. He appears in the episode "Cold Comfort" where he gets Jubilee's help to rescue his girlfriend Lorna Dane (not called Polaris here) from a government facility that is housing the X-Factor. After learning that Lorna is engaged to Havok, Iceman receives Xavier's apology for not being a good father figure to him. Iceman was also seen in many flashbacks which include "Sanctuary (part 1)" and "Xavier Remembers." In the revival series, he appears in the episode "Remember It", having traveled to the mutant nation Genosha where he was working as an ice cream vendor.
• Moira MacTaggert (voiced by Lally Cadeau in the original series, Martha Marion in the revival series) – An ally and old lover of Charles Xavier, she is a geneticist and an expert in mutant affairs. In the revival series, she appears in the episode "Remember It", as a member of the council of the mutant nation Genosha where she is killed in the Wild Sentinel attack.
• Banshee / Sean Cassidy (voiced by Phillip Williams in the original series, David Errigo Jr in the revival series) – Moira's fiancé who possesses a superhuman scream. In the revival series, he appears in the episode "Remember It", as a member of the council of the mutant nation Genosha where he is killed in the Wild Sentinel attack.
• Colossus / Piotr Rasputin (voiced by Robert Cait) – A mutant who can transform his body into organic steel which grants him super-strength. The X-Men helped Colossus when he was framed for crimes committed by Juggernaut. He later comes to them when Omega Red is attacking Russia.
• Dazzler / Alison Blaire (voiced by Jennifer Dale) – Dazzler appears as a background character in "Mojovision" and is central to the plot of "Dark Phoenix Saga (Part 1): Dazzled". In the revival series, she appears in the episode "Remember It", having traveled to the mutant nation Genosha where she is killed in the Wild Sentinel Attack.
• Lilandra Neramani (voiced by Kristina Nicoll in the original series, Morla Gorrondonna in the revival series) – Lilandra appeared in the third season. There, she sought the help of Professor X and his X-Men to help her defeat her evil brother D'Ken. During the short time they shared alone, Xavier and Lilandra quickly fell in love and eventually managed to defeat D'Ken. When Lilandra became the new heir to the Shi'ar throne, she kissed and thanked Xavier for his help and even offered for him to join her, but he declined to do this for as long as there was no peace between mankind and mutants. Lilandra left but eventually returned to Earth when Xavier became deadly ill in the final episode of the show. She took Xavier to the Shi'ar Empire with her so they could heal him. In the revival series, she first appeared in the episode "Lifedeath – Part 2" in which she was set to marry Charles Xavier after he was fully healed. After dealing with Deathbird and the Imperial Guard in the Astral Plane, Charles had to call off the marriage to Lilandra after sensing the Wild Sentinel attack on Genosha.
• Phoenix (voiced by Jennifer Dale) – The entire saga of the Phoenix is retold in the third season, divided into the five-part "Phoenix Saga," in which Jean acquires the power of the Phoenix; the battle for the M'Kraan crystal; the "Dark Phoenix Saga," showcasing the battle with the Hellfire Club; the Phoenix's transformation into Dark Phoenix; and the battle to decide Jean's fate. These particular episodes are as close as the cartoon came to directly duplicating the comic book storyline. The "Dark Phoenix Saga" is so accurate to the original stories that the episodes have the additional credit, "Based on stories by Chris Claremont." Rather than destroying an inhabited system, the animated story had her destroy a deserted system and only disable the attacking Shi'ar cruiser. After the Phoenix left Jean's body, Jean retained her original powers, whereas, in the aborted comic book ending, she would have been lobotomized by the Shi'ar and lost entirely.
• Illyana Rasputina (voiced by Tara Strong in the original series, Courtenay Taylor in the revival series) – Illyana appeared in the episode "Red Dawn." In that episode, she and her mother remained by the side of Colossus and the X-Men as they fought the newly released Omega Red. She also appeared in one of Cable's visions of the altered timestream in "Time Fugitives," in which, without the antibodies developed to fight Apocalypse's techno-organic virus, many mutants, like Illyana, developed harmful mutations that killed them. In the revival series, Magik as Darkchylde appears as one of the horrific visions induced by the Goblin Queen.
• Psylocke / Elizabeth Braddock (voiced by Tasha Simms) – Psylocke appears during the fourth season in the episode "The Promise of Apocalypse" (Beyond Good and Evil, part 2), and in the episode "End and Beginning" (Beyond Good and Evil, part 4). In this storyline, Psylocke appears to be a lone warrior who practices theft with a cause (a-la-Robin Hood). She comes into direct conflict with Archangel and, later on, Sabretooth and Mystique. She refers to her brother as fighting to help mutants but does not name him as Captain Britain.
• Silver Fox – Silver Fox appeared in the episode "Weapon X, Lies & Videotape." In this continuity, she too was a member of Team X, Wolverine's lover, and a victim of the Weapon X program.
• Maverick / Christoph Nord – Maverick appeared in the episode "Weapon X, Lies & Videotape," searching for answers about his past and his involvement with Weapon X, teaming with Wolverine, Sabretooth, and Silver Fox. In the episode "Whatever It Takes," the character Morph briefly turns into Maverick to taunt Wolverine. Maverick also appears in flashbacks that depict himself and Wolverine battling Omega Red, though that memory could be one of Weapon X's implanted memories.
• Darkstar / Laynia Petrovna (voiced by Elizabeth Rukavina) – Darkstar guest-starred in the episode "Red Dawn." She is initially the mutant enforcer for a group of rogue Russian generals seeking to reestablish the Soviet Union with the aid of Omega Red. After witnessing the crimes committed by Omega Red, Darkstar rebels against the generals and sides with the X-Men and Colossus.
• Lord Araki (voiced by Gavin Hammon in the revival series) – the Chancellor of the Shi'ar Empire.
• Longshot (voiced by Rod Wilson) – Longshot appears in the episodes "Mojovision" and "Longshot." In the animated series, it seemed to indicate that he might have a relationship with Spiral.
• Ka-Zar / Kevin Plunder (voiced by Robert Bockstael) – An ally of the X-Men who lives in the Savage Land. Ka-Zar appeared in the episodes "Reunion" (parts 1 and 2) and "Savage Land, Strange Heart" (parts 1 and 2).
  • Zabu – Ka-Zar's smilodon companion.
  • Shanna (voiced by Megan Smith) – Shanna is Ka-Zar's wife.
• Warlock (voiced by David Corban) – Warlock's history was altered so that he came to Earth to escape his destiny of merging with the Phalanx.
• Cannonball / Sam Guthrie – Cannonball made a small appearance along with his sister Paige Guthrie in the episode "Hidden Agenda." The episode featured Rogue learning about a new mutant that had been making waves in her hometown. However, his appearance caused a violation of continuity, as Cannonball had already made a cameo appearance (on a video screen in "Night of the Sentinels"), employing his mutant power and with blond hair.
• Captain America / Steve Rogers (voiced by Lawrence Bayne in the original series, Josh Keaton in the revival series) – Captain America appears in the episode "Old Soldiers." He is an American agent, sent along with the Canadian Wolverine, to rescue a scientist kidnapped by the Red Skull and the Nazis. He is present in the episode only in Wolverine's flashbacks. He was also seen in a cameo appearance in the episode "Red Dawn." In the revival series, he appears for the first time in the present day, in the episode "Bright Eyes". He is seen confronting Rogue while both are searching for Gyrich and Trask following the Wild Sentinel attack on Genosha. In the episode "Tolerance Is Extinction – Part 3", he and Iron Man protected president Kelly from Bastion's Prime Sentinels.
• Ms. Marvel / Carol Danvers (voiced by Roscoe Handford) – Ms. Marvel appears in the episode "A Rogue's Tale" (season 2), where she haunts Rogue for stealing her powers and leaving her in a coma.
• Scarlet Witch / Wanda Maximoff (voiced by Susan Roman) – The Scarlet Witch made both a guest and a cameo appearance. She appeared in the episode "Family Ties" along with Quicksilver when they tried to find out who their father was.
• Mjnari – Mjnari appeared in the episode "Whatever It Takes." In this episode, the Shadow King takes over Mjnari's body, so Rogue and Storm go to Africa to help him. Mjnari is a mutant with superhuman speed. He is also Storm's godson.
• Darrell Tanaka (voiced by Denis Akiyama) – A mutant healer in the mutant town of Skull Mesa. Like Mjnari, he's an original character.
• Cody Robbins – Cody was the first boy Rogue ever kissed, triggering her consciousness-stealing powers and putting him into a coma. He makes a flashback appearance in the episode "A Rogue's Tale" (season 2) and plays a supporting role in the episode "Love in Vain" (season 4) where he joins forces with the Brood Colony to reunite with Rogue.
• Trish Tilby (voiced by Donna Jay Fulks) – A reporter for NPR-TV news who was first seen in "Graduation Day". In the revival series, Tibly was now working at FC News in "Mutant Liberation Begins" where she covers the story of Magneto's trial. In "Tolerance is Extinction" Pt. 1, Trish is converted into a Prime Sentinel by Bastion.
• Dr. Valerie Cooper (voiced by Catherine Disher) – A United Nations official and ally of the X-Men. She first arrived, in the revival premiere "To Me, My X-Men", with a team to apprehend Bolivar Trask after the X-Men had destroyed his second Master Mold. In the episode "Mutant Liberation Begins", she showed up with a team of soldiers at the X-Mansion to apprehend Magneto, the new leader of the X-Men, for his crimes. After Magneto voluntarily surrendered himself, Val Cooper was present at his trial at the United Nations which resulted in his pardon. It was later revealed that she was secretly a member of OZT the entire time she worked with the X-Men. in the episode "Remember It", during the Massacre on Genosha, which she was not warned about, she was injured and went into hiding, being presumed dead in the aftermath. In the episode "Tolerance is Extinction", she regroups with Bastion and has a crisis of conscience, which leads her to release the imprisoned Magneto, as she finally realizes that Magneto was right all along about human and mutant coexistence being an impossible achievement.
• Goblin Queen / Madelyne Pryor (voiced by Jennifer Hale) – A mutant clone of Jean Grey created by Mister Sinister and the mother of Cable. In the episode "Fire Made Flesh", Sinister brainwashed her into the Goblin Queen and she unleashed Demons upon the X-Men, then took baby Nathan and went back to Sinister. Eventually Jean was able to free Madelyne from Sinister's control and together they rescued Nathan. In the episode "Remember It", Madelyne joined the council of Genosha and was killed by Wild Sentinels to massacre the island.
• Nina Da Costa (voiced by Christine Uhebe) – The mother of Sunspot who appears in the revival series.
• Ford (voiced by Jeff Bennett) – The butler to the Da Costa family. He was later turned into a Prime Sentinel by Bastion.
• Thunderbolt Ross (voiced by Michael Patrick McGill) – A high-ranking United States military officer, first seen in the revival series in the episode "Bright Eyes".

Neutral characters

Neutral groups

Starjammers

The Starjammers appear in the five-part episode "Phoenix Saga" led by Corsair (Major Christopher Summers). In this episode, the Starjammers attack the X-Men and steal the M'Kraan crystal, in hopes of trading into D'Ken so that Corsair can get close enough to kill him. However, D'Ken knew of their plan and tricked them, and got hold of the M'Kraan crystal. The Starjammers have to work with the X-Men to destroy D'Ken. Hepzibah, Raza Longknife, Ch'od, and Cr+eee were the Starjammers that appeared along with Corsair in the "Phoenix Saga." Corsair later appeared in the episode "Orphan's End." In this episode, Corsair is on the run from a corrupt Shi'ar police officer and he comes to Earth. Later, he finds out that Cyclops is his son. They first accuse Storm of being a traitor and attack her. After she explains to the Starjammers what is happening, they help Cyclops and Corsair defeat the officer.

Acolytes

The Acolytes appear in the "Sanctuary" storyline, in which Magneto builds Asteroid M as a haven for all mutants to live away from the hatred of baseline humans. The Acolytes, led by Fabian Cortez, aided Magneto in the liberation of the Genoshan mutant slaves from the hands of the Genoshan magistrates. After Cortez betrays Magneto and he is believed to have been killed by the X-Men, the Acolytes pledge their loyalty to Cortez, though they turn on him after he is later exposed.

• Fabian Cortez (voiced by Jeffrey Max Nicholls) – Cortez appeared in the two-part episode "Sanctuary." As in the comic's storyline, Cortez was the leader of the Acolytes and used his powers to bolster Magneto's abilities. However, Cortez's extreme anti-human sentiments led him to betray Magneto. Cortez threatened to destroy Earth but was stopped by the X-Men and Amelia Voght, who revealed Cortez's betrayal to the other Acolytes and the entire mutant population of Asteroid M. He was trapped in Asteroid M by a vengeful Magneto, but was rescued from its destruction by Apocalypse and Deathbird. Apocalypse granted him the ability to alter the mutations of other mutants. Cortez then appeared in the final season episode "The Fifth Horseman," now turned into a servant and worshipper of his savior. Cortez assembled a cult worshipping Apocalypse as well as the Hounds, a foursome of altered mutants, in an attempt to find a new body for Apocalypse, who was defeated and left bodiless in "Beyond Good and Evil." Cortez captured Jubilee and turned Beast into a feral monster, but was stopped by Caliban, one of the Hounds. After being defeated, Cortez begged Apocalypse to be forgiven for his failure; though Apocalypse was not angry at Cortez, for he still had a host body to reincarnate into Cortez's own.
• Amelia Voght (voiced by Sheila McCarthy and Sally Cahill in the original series, Donna Jay Fulks in the revival series) – Like her comics counterpart, Amelia was Charles Xavier's former lover and nurse. The two met and later fell in love after Xavier was crippled by Magneto, though they split because Amelia did not approve of the formation of the X-Men, preferring to live a quiet life with Charles and hide their mutant status. After meeting again in Asteroid M, she was initially hostile to Charles, though she forgave him after the X-Men helped defeat the fanatical Cortez. Amelia refused Charles' offer to join the X-Men, seeking now to find and follow her dreams. She became a nurse once again and joined Moira MacTaggert at the facilities of Muir Island. She also helped Beast, Magneto, Forge, and Mister Sinister fight against the Phalanx. In the revival series, she first appears in the episode "Bright Eyes", serving as a nurse in the aftermath of the Wild Sentinel attack on Genosha.
• Marco Delgado
• Carmella Unuscione – (voiced by Eve Crawford) Carmella appeared in episode "Sanctuary" as a prominent member of the Acolytes. As in the mainstream Marvel Universe, she was a devoted and passionate follower of Magneto and his beliefs.
• Chrome / Allen Marc Yuric
• Joanna Cargill – Joanna appeared in episode "Sanctuary." Though she did not have any speaking lines, she was a prominent member of the Acolytes. She also had a cameo in the first part of "One Man's Worth," where she was a member of the Mutant Resistance, but retained her Acolyte outfit.
• Burner / Byron Calley (voiced by Paul Haddad) – Burner appeared as a member of the Acolytes and, using his real name in the two-part episode "Sanctuary," was one of the many mutants that took Magneto's offer to live in Asteroid M. Calley was in charge of overseeing the defensive missiles Magneto had gathered to prevent an attack on the asteroid. When Fabian Cortez attempted to fire the missiles to destroy Earth, Calley opposed him. It was also revealed that he was an old friend of Gambit.

Morlocks

When the Morlocks captured Cyclops and Jean Grey, Storm led the X-Men to rescue them. In the end, after a duel between Storm and Callisto, not only did the X-Men get Cyclops and Jean back, but Storm also earned leadership of the Morlocks. They later appear in the episode "Out of the Past," where the Morlocks are captured by Lady Deathstrike and the Reavers and she unleashes an alien. The X-Men saved the Morlocks and defeated the alien.

• Callisto (voiced by Jennifer Dale in the original series, Courtenay Taylor in the revival series) – The leader.
• Annalee (voiced by Kay Tremblay) – She seemed to have greater control over her powers, causing the X-Men, including Jean Grey, to experience any state of mind she chose to place them in from Wolverine believing himself to be covered with scorpions to Jean believing herself to be a young child and Annalee her mother.
• Masque
• Sunder / Mark Hallett (voiced by Dan Hennessey)
• Leech (voiced by Ron Rubin in the original series, David Errigo Jr. in the revival series)
• Tommy (voiced by Donna Jay Fulks in the revival series)
• Plague (voiced by Judy Marshak)
• Erg
• Tarbaby
• Ape (voiced by Ross Petty)
• Mole
• Scaleface
• Glowworm
• Caliban
• Marianne – A green-skinned Morlock who is exclusive to the series.

In the revival series, Callisto has regained control of the Morlocks. She alongside Leech, Ape, Erg, and Tommy made cameos in "Mutant Liberation Begins". In "Remember It", Callisto, Leech, Scaleface, Ape, Erg, Tommy, Sunder, and Masque appear in Genosha where the Wild Sentinel caused the deaths of Callisto, Leech, Ape, Erg, and Tommy.

Shi'ar Imperial Guard

The Shi'ar Imperial Guard appeared in the episodes "Phoenix Saga" and "Dark Phoenix Saga." In the "Phoenix Saga," the Imperial guards track down Lilandra and the M'Kraan crystal, following D'Ken's orders, but after D'Ken fuses with the M'Kraan crystal and Lilandra becomes empress, the Imperial guards help the X-Men and the Starjammers defeat D'Ken. Later, in "Dark Phoenix Saga," the Imperial guards seek to destroy the Phoenix after she destroys a star system. Unlike the comics, the star system was deserted. So they go to Earth to stop Phoenix from destroying further systems.

In the revival series, the Shi'ar Imperial Guard first appears in the episode "Lifedeath, Part 2" on a mission to stop Ronan the Accuser during the Kree-Shi'ar War.

• Gladiator / Kallark (voiced by Richard Eden in the original series, David Errigo Jr. in the revival series) – A Strontian member of the Imperial Guard who sports the different abilities that his race has.
• Oracle / Sybil – A telepathic Shi'ar and member of the Imperial Guard.
• Starbolt – An unidentified alien and member of the Imperial Guard who possesses flight and energy projection.
• Smasher / Vril Rokk – An unidentified alien and member of the Shi'ar Imperial Guard with super-strength.
• Manta – An unidentified alien and member of the Shi'ar Imperial Guard who possesses flight, infrared vision, and generation of blinding light flashes.
• Titan – An unidentified alien and member of the Shi'ar Imperial Guard who possesses size-shifting abilities.
• Hussar – An unidentified alien and member of the Shi'ar Imperial Guard who can channel bio-electricity into any living thing.
• Quake – An unidentified rock-skinned reptilian humanoid alien and member of the Shi'ar Imperial Guard who possesses geokinesis.
• Hobgoblin / Shifter – A Chameloid shapeshifter and member of the Shi'ar Imperial Guard.
• Warstar / B'nee and C'cil – Two symbiotically linked mechanoids who are members of the Shi'ar Imperial Guard. While the small one known as B'nee has electrokinesis, the large one known as C'cil has super strength and durability.
• Vulcan / Gabriel Summers – He appears in the revival series as the Shi'ar Imperial Guard's latest member.

Assassins Guild

• Bella Donna Boudreaux (voiced by Susan Roman)
• Julian Boudreaux

Villains

• Apocalypse / En Sabah Nur (voiced by John Colicos in 1993 of the original series, James Blendick in 1994–1997 of the original series, Ross Marquand in the revival series, Adetokumboh M'Cormack as a younger En Sabah Nur in the revival series) – Apocalypse wants to pit humans and mutants in war and rule the stronger race. His first appearance is part of a plot line revolving around an offer to "cure" mutations. It is eventually revealed to be a trick to transform mutants into the Horsemen of Apocalypse. Apocalypse also appears in a storyline revolving around Cable. In this story, Apocalypse masquerades as a member of the Friends of Humanity, creating a techno-organic virus. In Cable's future (3999 A.D.), Apocalypse still wages his war against humanity and mutant-kind, opposed by Cable and his Clan Chosen. In the "Beyond Good and Evil" storyline, Apocalypse attempted to attain godhood by kidnapping the most powerful psychic beings from across the universe. He planned to kill them simultaneously, to release a wave of psychic energy powerful enough to re-create the universe in his image so he could rule unchallenged. However, Cable, Bishop, Magneto, Mystique, and the X-Men foil his plans. After the psychics are freed, they use their combined powers to trap Apocalypse in the Astral Plane for all eternity. In one of the final episodes of the series, Apocalypse is shown to be communicating from the Astral Plane with Fabian Cortez, whom Apocalypse had turned into his servant before the Axis of Time events. He tasked Cortez to find a powerful mutant to serve as his vessel, which would allow him to return to our world. However, Cortez failed due to the interruptions of both Beast and Caliban. This resulted in Apocalypse claiming Cortez, himself, as the vessel and Apocalypse lived once more. In this animated version, Apocalypse was depicted many times as an invincible opponent. None of the X-Men's powers combined could do him much harm. Apocalypse's plans were occasionally hampered by the time-travelers Bishop and Cable. In the revival series, some time-displaced members of the X-Men encounter a younger En Sabah Nur. The present-day Apocalypse visits Genosha where he pulls one of Gambit's playing cards from the wreckage that he goes through.
• Mister Sinister / Nathaniel Essex (voiced by Christopher Britton in both series) – Interested in the creation of more powerful mutants, Sinister had an obsession with Cyclops and Jean Grey, as well as other powerful mutants such as Magneto. Like his comic counterpart, this Sinister was capable of emitting energy blasts from his hands and was vulnerable to Cyclops' optic beams. He was served both by the Nasty Boys and the Savage Land Mutates. Like in the comics, Sinister was originally a British scientist during the Victorian era, though he was not mutated by Apocalypse. This version of Sinister experimented on mutants where he even obtained organs from his minion Jack the Ripper and used the knowledge obtained through his activities to mutate himself. An ancestor of Professor X, Dr. Xavier, was one of Sinister's opponents and attempted to save his victims. Despite his origins having no link to Apocalypse, Sinister joined forces with him when Apocalypse plotted to rewrite reality by harnessing the power of the Axis of Time. In the revival series, Sinister kidnapped Jean and created a clone of her, to infiltrate the X-Men and had a son with Cyclops, so that he can access the DNA of both Cyclops and Jean. In the episode "Fire Made Flesh", when the original Jean showed up, having escaped from Sinister, the other Jean was shocked to discover that she was a clone. Influenced by Sinister, she transformed herself into the Goblin Queen and unleashed Demons upon the X-Men, then took baby Nathan and went back to Sinister, who injected him with a techno-organic virus in hopes of making him invincible. Before he could finish his experiment, Cyclops and Jean's clone, who was released from his control, rescued Nathan, but not long before he was gravelly infected by the virus, as Sinister escaped. In the episode "Lifedeath Pt. 2", it was revealed that Sinister used Bolivar Trask's DNA to access Master Mold and unleash Trask's Sentinels on Genosha, destroying the mutant nation and killing many of the island's inhabitants, including Gambit and the clone, now called Madelyn Pryor. In the episode "Bright Eyes", Sinister was revealed to be working for Bastion's "Operation: Zero Tolerance". When the Prime Sentinel version of Trask was defeated and destroyed by the X-Men. Sinister confronted Bastion, expressing his disappointment about the death of Trask in the hands of the X-Men. Bastion later revealed to Sinister that Xavier was alive and was sent to space. Later on, he faced Jean in the episode "Tolerance is Extinction – Part 2" after the X-Men's Gold Team later raided Bastion's hideout. During the battle, Sinister was able to brainwash Cable into attacking Jean. However, Jean connected to the cosmic power of the Phoenix Force and reversed Sinister's mutant augmentations which freed Cable from his control and turned Sinister into an old man. Ashamed of his elderly appearance, Sinister ran away abandoning Bastion.
• Shadow King / Amahl Farouk (voiced by Maurice Dean Wint) – Xavier defeated Shadow King and his psychic essence was trapped in the Astral Plane. He escaped briefly and possessed Storm's godson Mjnari to possess Storm. The Shadow King was defeated and trapped once again only to be released after Professor X suffered an accident which left his mind vulnerable to the Shadow King's attempts to take possession of Xavier and leave his mind trapped in the Astral Plane.
• Sabretooth / Graydon Creed Sr. (voiced by Don Francks) – A longtime enemy of Wolverine and the father of Graydon Creed through Mystique. In this show, Sabretooth is depicted as a henchman for Magneto and was referred to as Graydon Creed Sr. instead of Victor Creed where he often picked on Graydon. In the earlier mainstream comics, however, Sabretooth and Magneto have never come together in any real capacity.
• Omega Red / Arkady Rossovich (voiced by Len Doncheff) – Omega Red appeared in the episode "Red Dawn." In this episode, he is resuscitated by three corrupt generals who want to recreate the Soviet Union and rule it. Colossus, with the help of the X-Men, fights to save his country and its fragile freedom from these forces of tyranny. Omega Red later reappeared in "A Deal With the Devil." In this episode, he is thawed and sent two miles (3 km) beneath the ocean to salvage a disabled, toxic, nuclear submarine threatening to break up near Hawaii. He also appeared in Wolverine's flashbacks, in which Team X fights against Omega Red and manages to freeze him. The details of their confrontation are unclear, as Wolverine's memories were altered to make him believe Omega Red killed Maverick and Silver Fox.
• Master Mold and the Sentinels – Master Mold (voiced by David Fox and Nigel Bennett in the original series, Eric Bauza in the revival series) and the Sentinels (voiced by David Fox and Barry Flatman in the original series, Eric Bauza in the revival series) serve an important role during the first season. In one episode, the Sentinels, sent by Bolivar Trask and Henry Gyrich, kidnap the X-Men Gambit, Storm, and Jubilee while vacationing on the fictional island of Genosha. There, the three X-Men, along with several other mutants, are enslaved by Trask and Gyrich who are harnessing the mutants' powers to create a massive dam in Genosha whose waterpower will be used to run Trask's newly created Master Mold. The X-Men eventually escape Genosha and destroy most of the Sentinels when Storm floods the dam. Later on in the season, they learn that Trask has lost control of Master Mold, who is now stationed in Washington, D.C. Master Mold has Senator Kelly and dozens of other important world leaders kidnapped and demands that Trask replace their brains with computers that can be controlled by Master Mold. The X-Men help rescue Trask and Kelly from Master Mold, and at the end of the season's last episode, Professor X, with the help of Magneto, flies the X-Men's jet, full of explosives, into Master Mold's torso. Master Mold and all Sentinels are believed to be destroyed at this point, but they resurface in season four. This time Master Mold wanted to create a new body for himself, but the X-Men eventually destroyed Master Mold once and for all. Even though he was destroyed, Master Mold will be reconstructed at some point in history, becoming the ruler in Bishop's timeline. In the revival series, Master Mold was shown to be lobotomized at the time when Bolivar Trask was rebuilding the Sentinels in the Sahara Desert. A Wild Sentinel later attacked Genosha.
• Nimrod – In the animated continuity, Nimrod came from the "Days of Future Past" timeline, where Bishop is its contemporary. Nimrod follows Bishop into the past to stop him from preventing the assassination of Senator Kelly which causes the future timeline. With the help of Storm's powers, Bishop was able to defeat Nimrod on numerous occasions.
• Dr. Bolivar Trask (voiced by Dan Hennessey in the original series, Gavin Hammon in the revival series) – Trask is the creator of the Sentinels, and was much longer-lived than his comic counterpart, returning for several episodes (one of which ironically featured him on the run from his creations, along with Gyrich). Trask was introduced here in the second episode of the series. In the revival series, Trask rebuilds the Sentinels with help from a lobotomized Master Mold. The X-Men are later contacted by Trask who is in Madripoor. When Rogue drops Trask to his death, he instead transforms into a Prime Sentinel who is defeated by Cable.
• Henry Peter Gyrich (voiced by Barry Flatman in the original series, Todd Haberkorn in the revival series) – Gyrich appeared in the episode "Night of the Sentinels." He later appeared in the season one finale "The Final Decision," the episode "Courage" (season 4), and the series finale "Graduation Day." Gyrich's personality in the series was an extreme take on that of his appearances in the Avengers and X-Men comic books as he supported mutant oppression, and possibly even extinction, whereas in the comics he was merely distrustful of superhumans in general. In the series finale, he quickly revealed that Professor X was a mutant by calling on a force wave with a remote, which revealed his power of telepathy at a worldwide conference. This weakened Xavier and nearly killed him by the end of the episode, though in the end he was taken away by Lilandra to be cured. This attack also nearly wounded many other people at the conference. Gyrich was taken away by two security guards because of his insanity but warned everyone not to trust anyone because they might well be mutants. In the revival series, Gyrich is shown to be incarcerated at the time when Jean Grey had to probe his mind for the location of Bolivar Trask. When Rogue later visits him to absorb some of his memories, Gyrich is later killed by Bastion.
• Graydon Creed (voiced by John Stocker) – A member of the Friends of Humanity. He is later expelled from the group and unsuccessfully attempts to re-join them by killing Mystique and Nightcrawler.
• Trevor Fitzroy (voiced by Stephen Russell) – Fitzroy was a guest-star in the two-part episode "One Man's Worth." Fitzroy, known as "the mutant traitor," under the orders of Master Mold, travels back in time to 1959 to murder Charles Xavier. In the cartoon, he does not kill those whose energy he absorbs.
• D'Ken (voiced by Maurice Dean Wint) – D'Ken was seen in the five-part "Phoenix Saga," where his history was very much like it was in the comics. He was also responsible for the death of Cyclops' parents, and him becoming an orphan on Earth. D'Ken gained control over the M'Kraan crystal, which gave him powers. D'Ken had fused with the M'Kraan crystal, so after the Phoenix fixed the crack that D'ken made on the crystal to gain its power, D'Ken was trapped inside it. The Phoenix later hid the crystal in the heart of the Sun.
• Erik the Red / Davan Shakari (voiced by Lawrence Bayne) – Erik the Red was sent by D'ken to capture Lilandra and the M'Kraan crystal for him.
• Zaladane (voiced by Lisa Dalbello) – Zaladane was featured in the two-part episode "Savage Land, Strange Heart". The high priestess of Garokk, Zaladane recruits Sauron into her scheme to awaken the god.
• Garokk (voiced by David Calderisi) – Garokk was featured in the two-part episode "Savage Land, Strange Heart".
• Deathbird / Cal'syee Neramani (voiced by Cari Kabinoff in the revival series) – Deathbird made several appearances in the original series. In flashbacks, she was seen at D'Ken's side when Christopher and Katherine Summers were abducted. Following Lilandra's ascension to the throne of the empire, Deathbird sought to overthrow her sister and install herself as Majestrix, for which she joined Apocalypse. However, Apocalypse was merely using Deathbird for his plans. During the episode "Beyond Good and Evil," she attacked Lilandra alongside Apocalypse. However, he abandoned her at the mercy of Lilandra and Imperial Guard Praetor Gladiator. Apocalypse simply wanted a distraction so he could kidnap Oracle, the psychic of the Imperial Guard. In the revival series, she first appears in the episode "Lifedeath – Part 2", where she confronts Ronan the Accuser before being informed of her sister's marriage plans to Charles Xavier.
• Juggernaut / Cain Marko (voiced by Rick Bennett) – Juggernaut fully appeared in three episodes: "The Unstoppable Juggernaut," "The Phoenix Saga, Part III: The Cry of the Banshee", and "Juggernaut Returns." He attempted to get revenge on Xavier in all three episodes.
• Mojo (voiced by Peter Wildman in the original series, David Errigo Jr. in the revival series) – Mojo appears in the episodes "Mojovision", "Longshot", and "Montendo / Lifedeath – Part 1". A disgusting, gargantuan creature from another dimension, Mojo kidnapped the X-Men, hoping to use them as the stars of his reality TV action show. Placing them in holographic worlds and making them fight for their lives, Mojo cared little about their safety. He was stopped after Longshot betrayed him, and the X-Men were returned to their home world. He later came to Earth to stop Longshot and once again make the X-Men the stars of his TV show, but he was once again sent packing. In the revival series, Mojo decided to pivot his media empire to video games, abducting Jubilee and Roberto Da Costa in an attempt to use them as entertainment for his slaves.
• Spiral / Rita Wayword (voiced by Cynthia Belliveau in the original series, Abby Trott in the revival series) – Spiral works for Mojo and helps him torture the captured X-Men by making them perform in television shows against their will but eventually betrays Mojo when she meets and falls in love with Longshot. Their relationship, however, takes a turn for the worse, and Spiral once again turns to Mojo's side in the end.
• Black Tom Cassidy (voiced by Phillip Williams) – Cassidy teamed up with Juggernaut to kidnap Lilandra in the "Phoenix Saga." He and Banshee are referred to as brothers in the series continuity with Banshee being the elder.
• Cameron Hodge (voiced by Brett Hasley in season 1, Gary Crawford in "The Phalanx Covenant") – Cameron Hodge first appeared as a lawyer for Hank McCoy. Later, Hodge was an ambassador working for the mutant-oppressing Genoshan government. After the corrupt government was overthrown by the combined efforts of Cable and the X-Men, Hodge, who was now missing an arm and a leg courtesy of Cable, vowed to get his revenge on the mutants. He was fortunate enough to have met up with the techno-organic alien race known as the Phalanx. Restoring his missing limbs and granting him a fraction of their power, the Phalanx promised to help him get his revenge, and, in exchange, he would help them assimilate planet Earth and its inhabitants. Hodge was defeated when the X-Men, with the help of Amelia Voght, Magneto, Mr. Sinister, and Warlock, drove the Phalanx from Earth.
• Purple Man / Zebediah Killgrave (voiced by Colin Fox) – The Purple Man appeared in the fourth episode of season five, "No Mutant Is an Island," as a telepathic mutant terrorist who plans on taking over the government using a group of young mutants under his mental control. In the end, the X-Man Cyclops gets in his way and eventually defeats him.
• High Evolutionary / Herbert Wyndham (voiced by Robert Bockstael) – The High Evolutionary is the Master of Wundagore. He seeks to create a superior generation of his New Men by using mutant DNA, mutating humans into beast-like beings, instead of experimenting on animals. He sets up a trap to capture Magneto, Quicksilver, and the Scarlet Witch, revealing to the twins that they are Magneto's children. He also appeared in a flashback, in which he fights Garokk and traps his essence in the ground of the Savage Land.
  • New Men – The New Men are the humanoid animal followers of the High Evolutionary.
• Arkon (voiced by Paul Haddad) – Arkon appeared in the episode "Storm Front" (parts 1 and 2). In the series, Arkon unleashes terrible weather conditions over Washington, D.C., to get Storm's attention. It works and he begs her to return with him to his planet, Corsus, to save it from meteorological chaos, which threatens his people. After much pleading, Arkon convinces Storm. Intrigued by this dynamic leader but slightly suspicious, Storm departs, but leaves a clue for the other X-Men to follow. Once Storm saves the planet, she is proclaimed savior throughout this universe, and Arkon asks her to marry him. Later she finds out that his ships are bringing thousands of slaves from nearby planets, and knows that Arkon is a tyrant.
• Proteus / Kevin McTaggart (voiced by Stuart Stone) – Proteus appeared in the two-part episode "Proteus" (season 4), which was based on 1979–1980 Uncanny X-Men storyline. In the episode, he escapes from Muir Island to find out who his father is which creates havoc around the city, and the X-Men have to stop him.
• Red Skull / Johann Schmidt (voiced by Cedric Smith) – The Red Skull appears in the episode "Old Soldiers." He appears in Wolverine's flashbacks when Wolverine remembers his past. Red Skull had kidnapped a scientist and was working for the Nazis.
• Silver Samurai / Kenuicho Harada (voiced by Denis Akiyama) – Silver Samurai appeared in the episode "The Lotus and the Steel." He is given little characterization in the episode, reduced to a mere gang leader whose thugs terrorize a village where Wolverine has been living. The villagers stand their ground and Wolverine bests the samurai in single combat by taking advantage of the Samurai's habit of teleporting behind him. Wolverine anticipates the move and disables the teleportation device, humiliating Samurai.
• The Phalanx – The Phalanx appears in the episode "The Phalanx Covenant." They are a techno-organic, extraterrestrial race bent on assimilating every other lifeform. They invade the Earth, though they are initially unable to assimilate mutants. This version of the Phalanx is an amalgamation of the comics Technarchy and Phalanx.
• The Adversary (voiced by Alison Sealy-Smith) – An owl-like demon who feeds on negative emotions.
• Ronan the Accuser (voiced by Todd Haberkorn) – Ronan appeared in the revival series in the episode "Lifedeath – Part 2" where he battles against Deathbird and the Shi'ar Imperial Guard.
• William Stryker (voiced by J.P. Karliak) – William Stryker appeared on a discussion show in light of footage detailing that Professor X was whisked away by the Shi'ar for treatment. This version is an anti-mutant Christian minister.

Villain teams

Brotherhood of Evil Mutants

The Brotherhood of Evil Mutants in this series is based on the third incarnation of the team from the comic books. The group is led by Mystique, with the Blob, Avalanche, and Pyro as members of the group, and Rogue being shown as a former member. The group is revealed to have been initially financed by the mutant Apocalypse though only Mystique knew this. Notably absent from the series was the Brotherhood member and Mystique's longtime lesbian lover Destiny who was a major member of the team in the comics. As such, major changes were made towards the series' adaptation of the "Days of Future Past" storyline, in which Destiny played a major role during the climax of the story.

• Mystique / Raven Darkholme (voiced by Randall Carpenter in 1993, Jennifer Dale in 1994–1996) – Mystique was shown as the leader of the Brotherhood, a close ally of Apocalypse, Rogue's foster mother, and Nightcrawler's birth mother. In the first season, Mystique aids Apocalypse in transforming several mutants into his Horsemen. Later he orders her to assassinate Senator Kelly, a task for which she impersonates the X-Man Gambit. She fails due to the interference of the real Gambit. In the second season, Mystique attempts to convince Rogue to return to the Brotherhood, though she fails in the end. Mystique once again appears as an ally of Apocalypse in the "Beyond Good and Evil" storyline; however, when Magneto realizes how mad Apocalypse's intentions are, Mystique joins him in trying to stop Apocalypse. In her final appearance of the series, Mystique is kidnapped by Graydon Creed, her child by Sabretooth. She is forced to send a letter to her other son, Nightcrawler, to lure him into a trap in exchange for her life. Creed attempts to kill all the mutants, but they escape. As Mystique flees, Nightcrawler gives chase because he wants to know why she abandoned him. Even though Mystique coldly tells him that she does not want him, Nightcrawler cannot bring himself to hate her and tells her that he will pray to God to allow him to forgive her. Touched that despite her cold treatment her son still cares for her, Mystique saves Nightcrawler from Creed and is presumed dead, but survives.
• Avalanche / Dominic Petros (voiced by Rod Coneybeare) – Avalanche was always accompanied by Pyro and Blob. He usually acts as a hired henchman of Mystique.
• Pyro / St. John Allerdyce (voiced by Graham Halley) – He appeared in four episodes (although he only had lines in three). He was characterized as British (instead of Australian like the comics), using slang terms such as "old bean" and "old girl" in conversation.
• Blob / Frederick J. Dukes (voiced by George Merner) – In season one, he was one of many mutant captives on Genosha. He later appeared in several episodes with the Brotherhood.

Friends of Humanity

The Friends of Humanity (FoH) is an anti-mutant group that does various attacks on mutants. They were formed when Robert Kelly turned away from the anti-mutant cause and had Graydon Creed as a member until the information about him being Sabretooth's human son was revealed.

• X-Cutioner / Carl Denti (voiced by Lawrence Bayne) – The new leader of the Friends of Humanity and a former United Nations agent. He was first seen in the first episode of the revival series "To Me, My X-Men", running a cell that was hunting mutants for a bounty and shipping Sentinel Blasters built from scavenged Sentinels. The cell was taken down when the X-Men rescued Roberto Da Costa. In the episode "Mutant Liberation Begins", Denti developed a Neutralizer rifle based on the same technology from the Inhibitor Collar. Planning to publicly rob Magneto of his mutant powers during his trial, Denti donned the guise of the X-Cutioner and took this rifle to the United Nations. After defeating the X-Men, X-Cutioner took the shot, but Storm sacrificed herself to save Magneto.

Nasty Boys

While the Nasty Boys are minor villains in the comics, the villainous team was featured several times in the series. Appearing first in the episode "Til Death Do Us Part (part 2)," the series featured four of the Boys: Ruckus, Gorgeous George, Hairbag, and Slab. The X-Man Morph, who had been resurrected by Mr. Sinister, had an "evil" side to his personality. "Evil" Morph was often a part-time member of the Nasty Boys, but Sinister increasingly lost control of him. The Nasty Boys reappeared in both parts of "Reunion," where, teamed with the Savage Land Mutates, they proved to be quite imposing to the X-Men, whom Sinister had rendered powerless. The X-Men eventually regained their powers, freed Morph from Sinister completely, and defeated Sinister and the Boys. After leaving the Savage Land, the Boys reappeared with Sinister in all four parts of "Beyond Good and Evil." Vertigo accompanied them (Sinister had given her a Magneto-inspired energy boost in "Reunion") and was made into a member, despite her female status.

• Gorgeous George / George Blair (voiced by Rod Wilson) – George played a prominent role. He appeared in X-Men Adventures, a comic book based on the animated series.
• Ruckus / Clement Wilson (voiced by Dan Hennessey) – Ruckus played a prominent role as leader of the Nasty Boys. He seemed to be older, but the others often cracked jokes at him being Sinister's "lapdog." He also appeared in several issues of X-Men Adventures.
• Slab / Christopher Anderson – Slab also appeared with the Nasty Boys.
• Hairbag (voiced by John Blackwood) – In the show, Hairbag's powers were altered somewhat, giving him poisonous breath and the ability to fire drugged quill-like hairs from his body.

Savage Land Mutates

The Savage Land Mutates were the creations of Magneto, though they were later recruited by Mister Sinister.

• Sauron / Karl Lykos (voiced by Robert Bockstael) – A native of the Savage Land who Sinister experimented on and gave the ability to absorb mutant energy and transform into a humanoid Pteranodon. After Sinister is defeated, Lykos is left to live in peace after mutants leave the Savage Land, leaving him unable to transform, and joins Ka-Zar's tribe.
• Brainchild (voiced by Robert Bockstael) – A Swamp Man with an enlarged cranium who possesses psychic powers.
• Amphibius (voiced by Peter McCowatt) – A Swamp Man who was mutated into a humanoid frog.
• Lupo – A Swamp Man who was mutated into a white werewolf-like form.
• Barbarus (voiced by Bob Zeidel in the first appearance, Peter McCowatt in later appearances) – A Swamp Man who was mutated to have four arms.
• Vertigo (voiced by Megan Smith) – Vertigo was one of the followers of Mr. Sinister in the Savage Land. In the series, her powers were amplified after Mr. Sinister genetically modified her with Magneto's DNA. Later on, she joins the Nasty Boys who were also working for Mister Sinister.

In the X-Men '97 episode "Bright Eyes", Brainchild and Amphibius appeared at Gambit's funeral.

Inner Circle Club

The Hellfire Club appeared in the "Dark Phoenix Saga" storyline, though it was renamed Inner Circle Club to prevent controversy regarding the use of the word hellfire, which could have prompted accusations of satanism. The Inner Circle's leaders aim to control Jean Grey and brainwash her into believing herself to be the Queen of the Inner Circle, though they only manage to unleash the Dark Phoenix.

• Sebastian Shaw (voiced by David Bryant in the original series, Travis Willingham in the revival series) – leader of the Inner Circle Club. In the revival series, he appears in the episode "Remember It" as a member of the ruling council of the mutant nation Genosha, where he is killed in the Wild Sentinel Attack.
• Emma Frost (voiced by Cynthia Dale in the original series, Martha Marion in the revival series) – The White Queen of the Inner Circle Club. In X-Men '97, she joins the ruling council of Genosha and survives the Sentinels' attack on the island by unlocking the ability to transform into organic diamond.
• Jason Wyngarde / Mastermind (voiced by Nigel Bennett) – Wyngarde appears in the first three parts of the "Dark Phoenix Saga." He uses his powers to control the Phoenix but ends up unleashing the Dark Phoenix. Wyngarde is also a member of the Mutant Resistance in the alternate reality shown in the first part of the episode "One Man's Worth."
• Harry Leland / Black Bishop (voiced by Geoff Kahnert)
• Donald Pierce (voiced by Walker Boone)

Horsemen of Apocalypse

The Four Horsemen of Apocalypse were the same ones as in the X-Factor comics. The lineup was composed of mutants that submitted themselves to the so-called mutant "cure," developed by Dr. Adler (Mystique in disguise). The cure process transformed the four mutants: Autumn Rolfson / Famine (voiced by Catherine Gallant), Plague / Pestilence, Abraham Kieros / War (voiced by James Millington), and Archangel / Death into altered mutants under the control of Apocalypse.

The four-part episode "Beyond Good and Evil" featured another team of Horsemen, created by Apocalypse during his time in Ancient Egypt. The style of these Horsemen reflected their Egyptian origins.

Reavers

The Reavers are a gang of cyborgs. They appear alongside Lady Deathstrike when she goes down to the Morlock's tunnel and tricks Wolverine into coming down there, hoping to get him to open an alien ship that she found in the tunnel. When the ship is opened, an alien comes out of the ship and sucks the life out of the Reavers. So Lady Deathstrike has to work together with Wolverine to defeat the alien. In the end, the X-Men defeat the alien and all the Reavers' life energy is sent back to their bodies.

• Bonebreaker
• Pretty Boy
• Murray Reese
• Wade Cole
• Lady Deathstrike / Yuriko Oyama (voiced by Jane Luk) – Lady Deathstrike was also a Reavers member. She had a romantic past with Wolverine, likely merging her character with Wolverine's former fiancée, Mariko Yashida. She first appeared in the episode "Out of the Past" (season 3). Deathstrike joined the Reavers and became a cyborg to avenge the death of her father, Professor Oyama, during Logan's rampage at the Weapon X headquarters. In this continuity, the Professor (of Weapon X) and Yuriko's father are the same man. In the comic's continuity, the Professor is a man named Thorton and has no blood relation to the Oyamas.

Weapon X

The Weapon X program was responsible for Wolverine's adamantium skeleton and fabricated memories. The program was directed by the Professor and Dr. Cornelius. Weapon X captured the four members of Team X (Logan, Victor Creed, Maverick, and Silver Fox) to brainwash them to become an elite team of mind-controlled assassins. However, Wolverine escaped and his rampage through the Weapon X headquarters allowed Creed, Maverick, and Silver Fox to escape.

• Professor (in video and flashbacks)
• Dr. Cornelius (in shadows within video and flashbacks)
• Professor Oyama - Never actually appears in the series. Mentioned by Professor Thorton in "Weapon X, Lies, and Videotape" and by Lady Deathstrike in "Out of the Past."
• Talos – Shiva / Talos appeared in the episode "Weapon X, Lies & Videotape." Due to network censorship, the robot's name was changed to Talos.

Mojo's Trackers and Wildways

Besides Spiral, Mojo employs several agents and servants:

• Major Domo
• Arize
• Gog
• Quark
• The Warwolves

The Colony and Brood

The Colony are depicted as reptilian humanoids with mechanical tentacles and the ability to generate electricity from their tails. Additionally, the Colony can generate spores that transform others into hybrid drones.

Children of the Shadow

The Children of the Shadow

The Children of the Shadow are a group of mutant criminals. Cyclops battles them when he visits the mutant town of Skull Mesa.

• Solarr / Bill Braddock (voiced by Lorne Kennedy) – The leader of the Children of the Shadow. In this show, Solarr goes by the name of Bill Braddock.
• Chet Lambert (voiced by Tom Harvey) – Exclusive to the TV series, Chet Lambert is a mutant who possesses intangibility.
• Toad / Mortimer Toynbee (voiced by Tony Daniels) – A member of the Children of the Shadow. He possesses toad-like abilities.

The Avengers (in the Xavier-less time-line)

• Captain America
• Iron Man / Tony Stark
• Giant Man / Hank Pym
• Wasp / Janet van Dyne
• Black Widow / Natasha Romanoff
• Hercules
• Scarlet Spider / Ben Reilly
• Daredevil / Matt Murdock

Operation: Zero Tolerence

Operation: Zero Tolerance (OZT) was a United Nations anti-mutant strike force that appeared in X-Men '97. It was responsible for turning humans into Prime Sentinels, cyborgs who were injected with Mister Sinister's Techno-Organic Virus, transforming them into Sentinel hybrids. In Cable's timeline, after 300 years of Evolutionary War, Bastion succeeded in creating a utopia for the new post-humans, in which the surviving mutants were pressed into slavery.

• Bastion / Sebastion Gilberti (voiced by Theo James) – The leader of OZT, who was born a Sentinel hybrid after Nimrod infected his father. He is later killed when Kelly sends missiles to destroy his asteroid.
• Daria (voiced by Anjali Bhimani) – Bastion's personal assistant.
• Doctor Doom / Victor von Doom (voiced by Ross Marquand) – The dictator of Latveria who allies with Operation: Zero Tolerance.
• Helmut Zemo (voiced by Rama Vallury) – A supporter of Operation: Zero Tolerance.
• Prime Sentinels – A group of people-turned-cyborgs with Sentinel traits. Bolivar Trask, Trish Tilby, and the Da Costa family's butler Ford were converted into Prime Sentinels.
  • Rose Gilberti (voiced by Kari Wahlgren) – The mother of Bastion who was converted into a Prime Sentinel.

Cameo appearances (heroes and villains)

• War Machine (James Rhodes), Sunfire, Doctor Strange, Captain Britain / Brian Braddock, Thunderbird / John Proudstar, and Spider-Man had a cameo appearance in the "Phoenix Saga".
• Domino / Neena Thurman (voiced by Jennifer Dale), Feral / Maria Callasantos, Rictor / Julio "Ric" Richter, and Thunderbird were seen as slaves on Slave Island. Domino also had a cameo appearance in the episode "Repo Man."
• Kangaroo / Frank Oliver, Random / Marshall Stone III, Arclight / Philippa Sontag, Blockbuster / Michael Baer, Tarbaby, and Black Panther (T'Chaka) had a cameo appearance in the two-part episode "Sanctuary."
• Ghost Rider appeared briefly as a memory in one of Gambit's flashbacks in the episode "Final Decision."
• Deadpool / Wade Wilson – Morph briefly transforms into Deadpool. Deadpool's face is also seen in a flashback while Professor X is probing the mind of Sabretooth. In the "Phoenix Saga," an evil psychic projection of Xavier also created an illusion of Deadpool while tormenting Wolverine.
• Moondragon / Heather Douglas, Stryfe, and Typhoid Mary / Mary Walker had a cameo in the episode "Beyond Good and Evil (part 4)."
• Immortus (Kang the Conqueror / Nathaniel Richards) had a cameo after he was revealed as the true identity of Bender, the Axis of Time custodian.
• Gatecrasher had a cameo appearance in the episode "Proteus (part 1)."
• Eternity, Doctor Strange, Uatu the Watcher, and Thor had a cameo appearance in the "Dark Phoenix Saga" (part 3).
• Nick Fury, G. W. Bridge, and War Machine are seen in the episode "Time Fugitives (part 1)" aboard the S.H.I.E.L.D. Helicarrier watching a U.S. Senate committee hearing on mutants being blamed for infecting non-mutants with a "mutant plague" (genetically engineered by Apocalypse masquerading as a member of the Friends of Humanity). War Machine is also briefly seen earlier in this episode in the year 3999 AD, fighting against Cable and his allies.
• Hulk / Bruce Banner made a cameo as one of Xavier's robots in "The Juggernaut Returns."
• Punisher / Frank Castle is shown on a video game cover in the episode "Days of Future Past (Part 1)" and as a robot in the episode "Mojovision".
• Senyaka, Forearm / Michael McCain, Reaper / Pantu Hurageb, Strobe, Tusk, Ape, Mole, Tommy, Random, Slither, and Copycat / Vanessa Carlysle appear as background extras in the episode "Secrets, Not Long Buried" as inhabitants of Skull Mesa alongside some mutant exclusive to the series like Andrew and Nicole (who are crystal creators), Watchdog (a dog-faced mutant with telepathy and power-negating abilities), and an unnamed lady who can control plants.
• Daredevil / Matt Murdock can be seen as a dartboard in the episode "No Mutant Is an Island."
• Howard the Duck can be seen on Beast's T-shirt in the episode "The Phoenix Saga, Part Two: The Dark Shroud"
• Technet appear in a pub in Scotland in "Proteus (part 1)."
• Super-Skrull is briefly seen among the audience in the stadium in the episode "Mojovision".
• Arclight, Artie Maddicks, Blockbuster, Callisto, Carmella Unuscione, Copycat, Feral, Forearm, Kangaroo I, Marianne, Mole, Reaper, Sunfire, Toad, and Tusk made cameo appearances during the episode "Graduation Day" among the mutant army Magneto assembles on Genosha.
• Dust, Maggott, Stacy X, Nature Girl, and Loa made photographic cameos in the X-Men '97 episode "To Me, My X-Men",
• Blob, Thunderbird, and Sunfire made a cameo during the Genosha part of the Motendo video game world, in the X-Men '97 episode "Motendo".
• Marrow, Pixie, Gentle, Glob Herman, Gargouille, Nature Girl, Multiple Man, Exodus, Cipher, Dazzler, Boom-Boom, Archangel, and Squid-Boy appear as residents of Genosha in the X-Men '97 episode "Remember It". Uatu the Watcher can also be seen witnessing the attack on Genosha.
• Bella Donna, Pierre, Bobby, Aurora, Blob, Multiple Man, Angel Salvadore, Mimic, Strong Guy, and Amelia Vought made cameo appearances at Gambit's funeral and the aftermath of the Genosha massacre in the X-Men '97 episode "Bright Eyes".
• Doctor Doom, Helmut Zemo, Spider-Man, Silver Samurai, and Omega Red make cameo appearances in the X-Men '97 episode "Tolerance is Extinction – Part 1",
• Psylocke, Aurora, Northstar, Puck, Silver Samurai, Omega Red, Darkstar, Crimson Dynamo, Daredevil, Black Panther, Cloak and Dagger, Iron Man, Captain America, Peter Parker, Mary Jane Watson, and Flash Thompson make cameo appearances in the X-Men '97 episode "Tolerance is Extinction – Part 3".

External links

• Full cast for X-Men: The Animated Series at IMDb
• Full cast for X-Men '97 at IMDb

X-Men (TV series) cast at TV.com (Archived June 27, 2008, at the Wayback Machine)