Killer Croc

Killer Croc is a major villain from the Batman series. He first appeared in Batman #357 and has been a recurring villain ever since. He made multiple appearances in various Batman related media.

Biography
Waylon Jones was 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 Robin, who defeated him. He has been a powerful foe for the dark knight ever since.

Connection with All-Stars

 * Killer Croc appears in the background of the Arkham City stage as one of the villains participating in the super-villain gang war.