Changeling
Kevin Sydney

When Kevin Sydney first appeared as a distinct character, it was as the mysterious "master" or deputy leader of Factor Three. He was not yet identified by name. This was in the issue #35 of the original X-Men series. It was until later that the name of the "master" was revealed. He was the mutant named "Changeling."

The Changeling was seen again in the next issue, X-Men (vol. 1) #36. Once again he appeared briefly as a mysterious figure. He wore a strange helmet and his name had yet to be revealed.

The mysterious figure was finally identified by name as "The Changeling" in the next issue, X-Men (vol. 1) #37.

The Changeling was later recruited to impersonate Professor Charles Xavier. He used his metamorphic power to appear as Professor X. Furthermore, the real Charles Xavier temporarily imbued him with limited telepathic powers.

This character is in the following 46 stories which have been indexed by this website:
Excalibur: The Possession (July 1991): "The Changeling"
The Sensational She-Hulk

The Sensational She-Hulk #34 (Dec. 1991): "Who Was That Zombie I Saw You With?"
The Sensational She-Hulk #35 (Jan. 1992): "Hail, Hail the Gang's All Dead"

The Uncanny X-Men (vol. 1) #138 (Oct. 1980): "Elegy" (1-panel cameo)
The X-Men

The X-Men (vol. 1) #26 (Nov. 1966): "Holocaust!" (behind the scenes)
The X-Men (vol. 1) #27 (Dec. 1966): "Re-Enter: The Mimic!" (behind the scenes)
The X-Men (vol. 1) #28 (Jan. 1967): "The Wail of the Banshee!" (behind the scenes)
The X-Men (vol. 1) #29 (Feb. 1967): "When Titans Clash!" (behind the scenes)
The X-Men (vol. 1) #30 (Mar. 1967): "The Warlock Wakes!" (behind the scenes)
The X-Men (vol. 1) #31 (Apr. 1967): "We Must Destroy...the Cobalt Man!" (behind the scenes)
The X-Men (vol. 1) #32 (May 1967): "Beware the Juggernaut, My Son!" (behind the scenes)
The X-Men (vol. 1) #33 (June 1967): "Into the Crimson Cosmos!" (behind the scenes)
The X-Men (vol. 1) #34 (July 1967): "War -- In a World of Darkness!" (behind the scenes)
The X-Men (vol. 1) #35 (Aug. 1967): "Along Came a Spider..." (cameo)
The X-Men (vol. 1) #36 (Sep. 1967): "Mekano Lives!" (cameo)
The X-Men (vol. 1) #37 (Oct. 1967): "We, the Jury..."
The X-Men (vol. 1) #38 (Nov. 1967): "The Sinister Shadow of... Doomsday!"
The X-Men (vol. 1) #39 (Dec. 1967): "The Fateful Finale!"
The X-Men (vol. 1) #40 (Jan. 1968): "The Mark of the Monster!"
The X-Men (vol. 1) #41 (Feb. 1968): "Now Strikes... the Sub-Human!"
The X-Men (vol. 1) #42 (Mar. 1968): "If I Should Die...!"
The X-Men (vol. 1) #43 (Apr. 1968): "The Torch Is Passed...!" (mentioned in text & seen in picture)
The X-Men (vol. 1) #46 (July 1968): "The End of the X-Men!" (mentioned)
X-Men (vol. 1) #60 (Sep. 1969): "In the Shadow of... Sauron!" (mentioned)
X-Men (vol. 1) #65 (Feb. 1970): "Before I'd Be Slave..."
X-Men (vol. 1) #74 (Feb. 1972): "Holocaust!" (behind the scenes)
X-Men (vol. 1) #75 (Apr. 1972): "Re-Enter: The Mimic!" (behind the scenes)
X-Men (vol. 1) #76 (June 1972): "The Wail of the Banshee!" (behind the scenes)
X-Men (vol. 1) #77 (Aug. 1972): "When Titans Clash!" (behind the scenes)
X-Men (vol. 1) #78 (Oct. 1972): "The Warlock Wakes!" (behind the scenes)
X-Men (vol. 1) #79 (Dec. 1972): "We Must Destroy...the Cobalt Man!" (behind the scenes)
X-Men (vol. 1) #80 (Feb. 1973): "Beware the Juggernaut, My Son!" (behind the scenes)
X-Men (vol. 1) #81 (Apr. 1973): "Into the Crimson Cosmos!" (behind the scenes)
X-Men (vol. 1) #82 (June 1973): "War -- In a World of Darkness!" (behind the scenes)
X-Men (vol. 1) #83 (Aug. 1973): "Along Came a Spider..." (cameo)
X-Men (vol. 1) #84 (Oct. 1973): "Mekano Lives!" (cameo)
X-Men (vol. 1) #85 (Dec. 1973): "We, the Jury..."
X-Men (vol. 1) #86 (Feb. 1974): "The Sinister Shadow of... Doomsday!"
X-Men (vol. 1) #87 (Apr. 1974): "The Fateful Finale!"
X-Men (vol. 1) #88 (June 1974): "The Mark of the Monster!"
X-Men (vol. 1) #89 (Aug. 1974): "Now Strikes... the Sub-Human!"
X-Men (vol. 1) #90 (Oct. 1974): "If I Should Die...!"
X-Men (vol. 1) #91 (Dec. 1974): "The Torch Is Passed...!" (mentioned in text & seen in picture)

X-Men: Legends (June 2000): "Diary of a False Man"
X-Men: The Hidden Years

X-Men: The Hidden Years #1 (Dec. 1999): "Once More the Savage Land"
X-Men: The Hidden Years #8 (July 2000): "Shadow on the Stars"

Suggested links for further research about this character:
  - http://en.wikipedia.org/wiki/Changeling_(Marvel_Comics)
  - http://comicbookdb.com/character.php?ID=5790
  - http://www.marvunapp.com/master/chaachan.htm
  - http://www.marvunapp.com/master/faafam.htm
  - http://www.marvunapp.com/master/x0xmxz.htm
  - http://www.comicboards.com/marvelguide/c2.html
  - http://www.uncannyxmen.net/db/issues/showquestion.asp?fldAuto=2748

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