Mister Sinister vs Killer Croc Facts
Creator
Chris Claremont, Marc Silvestri
Gene Colan, Gerry Conway
Universe
Earth-616
New earth
Publisher
Marvel comics
DC comics
In Comics
Uncanny X-Men #221 (September, 1987)
Batman #357 (March, 1983)
Citizenship
British
American
Marital Status
Widowed
Single
Occupation
Geneticist, Criminal, biologist and mutant-supremacist
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Base
Many bases throughout the world including his State Home for Foundlings and the Center for Homo Superior Medical Care.
Gotham City
Relatives
Not Available
Not Available