Waylon Jones was born with a genetic mutation giving him a reptile's skin, sharp claws, and teeth; due to genetic atavism. Croc became a circus wrestler who would rise to conquer the Gotham Mob racket only then to become one of Batman's most physically imposing rogues.

1 Batman: The Animated Series (TV Series - 1992)
2 The New Batman Adventures (TV Series - 1998)
3 The Batman (TV Series - 2005)
4 Batman: Gotham Knight (Animated Film - 2008)
5 Batman: The Brave AndThe Bold (TV Series - 2011)
6 Beware the Batman (TV Series - 2014)
7 Son of Batman (Animated Film - 2014)
8 Batman Unlimited: Mechs vs. Mutants (Animated Film - 2016)
9 Suicide Squad (Movie - 2016)
10 DC Super Hero Girls (Web-Series - 2016)
11 The Lego Batman Movie (Animated Film - 2017)

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