Thunerbird was one of the mutant slaves in Genosha.[1]

Secret Wars

When the Multiverse was destroyed in the last incursion between Earth-616 and Earth-1610, Doctor Doom, with Beyonder's powers, recreated it in the form of Battleworld. Earth-92131 was recreated in the Westchester domain, ruled by Baron Kelly.[2]

The Shadow King realized that in comparison to those other domains, Westchester was a fragile paradise, and set out to ensure its survival by any means. Using the cloned body of Professor X, the Shadow King became Cassandra Nova, and used his new identity to become a politician and establish the Bureau of Super-Powers.[3]

At the Clear Mountain, Cassandra Nova used a form of psychotherapy called the "Mind Field" to brainwash those mutants who arrived to the institute and force them to live in harmony, Thunderbird was one of those mutants.[4]


Seemingly those of the John Proudstar of Earth-616.


Seemingly those of the John Proudstar of Earth-616.

  • Thunderbird appeared in the opening of X-Men: The Animated Series in the scene where a group of villains and the X-Men charge at each other. According to the opening's co-designer Larry Houston, this is simply because he felt the amount of villains needed to balance out the amount of heroes in the scene.[5]
  • In the original plot summary for the first episode of X-Men: The Animated Series, Thunderbird was a member of the X-Men and was going to die, a fate shared with his comic book counterpart. Series developer Eric Lewald replaced Thunderbird with Morph, feeling uneasy about killing off the show's only Native American character right away.[6]

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