Real Name: Kevin Sidney
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Changeling was a mutant metamorph who could alter his physical appearance and voice to mimic that of any other human being. His power could also transform the appearance of his costume as well to reflect the clothing worn by his chosen template. During Changeling’s time with the X-Men, Professor X endowed him with limited telepathic abilities. A side effect of this was the activation of Changeling’s own latent minor telekinetic abilities.
Whilst a member of Factor Three, Changeling often employed advanced weaponry of alien Siri design, including a personal ray gun.
Little is known of the life of mutant shape-changer Kevin Sidney before he became second-in-command of the subversive organization Factor Three and adopted the alias Changeling. After discovering the true plot by Factor Three’s leader, the Mutant Master, to wipe out both man- and mutantkind, Changeling freed Professor Charles Xavier, the telepathic founder of the team of mutant heroes the X-Men, and the sonic-screaming mutant known as Banshee who had been captured by the organization. Banshee unmasked the Mutant Master as a member of the alien Siri race, and the X-Men and Factor Three’s mutant agents joined forces to defeat him.
Shortly thereafter, Changeling discovered that he had terminal cancer. Seeking to make amends for his past, Changeling approached Xavier, who asked Changeling to impersonate him while he went into seclusion to prepare a means of repelling an approaching invasion by the alien Z’nox.
While using his shape-shifting powers to pose as Xavier, Changeling heroically died while thwarting an attempt by the subterranean menace Grotesk, lone survivor of a subterranean race who sought to destroy the Earth, when an oscillotron machine exploded, mortally wounding him. Changeling was impersonating Xavier at the time, and as such the X-Men believed their mentor dead until the real Professor X eventually returned.
Later, the voodoo practitioner known as the Black Talon resurrected Changeling as a zombie and forced him to serve in a team of other mutant zombies called the X-Humed. Using his powers to impersonate the great musician Elvis Presley, Changeling was able to draw attention to the X-Humed’s activities. After the gamma-spawned adventurer She-Hulk defeated the Black Talon, Changeling once again became truly dead.
Changeling then seemingly returned as a malevolent ghost to haunt the British super-team Excalibur, however this was later revealed to be a hoax perpetrated by the sorcerer Merlyn.
First Appearance: Uncanny X-Men (1963) #35
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View a chronological listing of this character's appearances
Excalibur: The Possession (1991)
Marvel Encyclopedia (2002)
Official Handbook of the Marvel Universe A to Z (2008)
Official Handbook of the Marvel Universe: Book of the Dead 2004 (2004)
The Marvel Encyclopedia (2006)
HC The Official Handbook of the Marvel Universe (1983)
- 'The Marvel Encyclopedia'
#13 The Official Handbook of the Marvel Universe Deluxe Edition (1985)
- 'Book of the Dead and Inactive 1 : Air-Walker to Man-Wolf'
#16 The Official Handbook of the Marvel Universe: Master Edition (1990)
- 'Book of the Dead (Air-Walker to Death-Stalker)'
The Sensational She-Hulk (1989)
#34 Uncanny X-Men (1963)
- 'Who Was That Zombie I Saw You With?'#35
- 'Hail, Hail the Gang's All Dead'
#36 X-Men Legends (2000)
- 'Mekano Lives!'#37
- 'We, The Jury...'#38
- 'The Sinister Shadow of...Doomsday!'#39
- 'The Fateful Finale!'#41
- 'Now Strikes... The Sub-Human!'#42
- 'If I Should Die...!'#43
- 'The Torch is Passed...!'#65
- 'Before I'd Be Slave...'#138
X-Men: Hidden Years (1999)
- 'Once More, The Savage Land'#8
- 'Shadow on the Stars'
X-Men (Marvel)(01 - Mutants)
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