Killer Croc character bio (Arkham Asylum)
Tick! Tock! Feed the Croc!

–One of Killer Croc's Game Over lines from Batman: Arkham Asylum.

Killer Croc real name, Waylon Jones is a supervillain who appears in comic books published by DC Comics. He is an enemy of Batman. He is a man and former alligator wrestler born with a form of atavism that imparted him with reptilian traits. His drunk aunt grew to hate her nephew's hideous appearance and brutal behavior. While still an adolescent, his aunt abused him and bullied him by calling him names like "lizardboy" and "a reptilian freak". Croc killed his aunt and became a criminal. After countless killings and biting off Aaron Cash's hand, he faced off against Batman and the new Robin, who defeated him. He was recruited by Amanda Waller to be on the Suicide Squad.