Changeling (Marvel Comics character)
fictional character in Marvel Comics

Changeling (Kevin Sidney) is a fictional character appearing in American comic books published by Marvel Comics. Created by writer Roy Thomas and artist Werner Roth, the character first appeared in The X-Men #35 (Aug. 1967).
Changeling is a mutant shapeshifter and was a short-lived adversary for the X-Men who impersonated Professor X and died shortly after, making him the first member of the X-Men to die in action.
A character loosely inspired by Changeling named Morph was featured in the animated series X-Men: The Animated Series and X-Men '97, who was then adapted to the 2001 series Exiles as an alternate-universe version of Changeling. The original Changeling was resurrected in the 2025 series Astonishing X-Men, now resembling Morph's appearance in X-Men '97.
Publication history
Changeling was introduced in The X-Men #37–42, part of the Factor Three storyline. Although dying at the end of this run, he was thought to have been seen as a ghost in Excalibur: The Possession (1991) and returned as a zombie in The Sensational She-Hulk #34–35 (1991–1992).
The character was later the basis for an easygoing comic-relief character in X-Men: The Animated Series named Morph. According to showrunner Eric Lewald's behind-the-scenes book, Previously on X-Men: The Making of an Animated Series, the creators (including writer Mark Edward Edens) had intended for Thunderbird to be the series' early sacrifice, but they became uncomfortable with the idea of killing off a Native American character.
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