Killer Croc (Earth-Alpha)

Killer Croc is the Earth-Alpha incarnation of the character.

His real name is Waylon Cobblepot, a deformed man who was abandoned in the sewers at a baby. He travelled as a circus freak as he came of age. Waylon's horrible past turned him into a bitter and ruthless sociopath. After the Joker's death, Killer Croc became a notable crime boss leading what remained by the Joker gang.

Biography
Waylon Cobblepot was once to socialites Oswald and Esther Cobblepot. Disgusted by his appearance, Oswald confined Waylon to a cage and later threw him into the sewers, killing Esther when she tried to stop him.

Waylon could the name Killer Croc and became leader of the Joker gang after the Joker was killed. Croc had his men kidnap Oswald. Brought to Croc's lair in the sewers, Oswald offered to help his son return to the surface in exchange for helping him become mayor. Croc accepted but warned Cobblepot that he had evidence of his father's corporate crimes in case he double crossed him.

Batman investigated Oswald's connection with the Killer Croc gang.

Running for mayor, Oswald had Killer Croc wreck havoc not he city to discredit its current mayor. Batman intervened but an encounter with Catwoman allowed Croc to get away.

Killer Croc later abducted Gotham's ice princess and killed her, framing Batman for the act. He also sabotaged the Batmobile, allowing Oswald to have it rampage through Gotham until Batman disconnected the device. After Batman played a recording of Oswald's disparaging remarks about the people of Gotham during his next speech, destroying his image and preventing him from being elected as mayor. His plans ruined, Oswald decided to cut ties with Croc by sending Gotham police after him. Croc survived and decided to abduct and kill all of Gotham's firstborn sons in revenge for his father abandoning him.

At a charity ball hosted by Oswald in an attempt to repair the broken bridges for the next election, Killer Croc appeared and announced his plan. He intended to take Oswald's own and Waylon's own half-brother, Chip Cobblepot, but Oswald gave himself up in his stead.

Killer Croc tried to have his men bomb Gotham but Alfred Pennyworth jammed the signal. Batman confronted Croc in his lair. Croc tried to kill batman but fell through a window into the sewer's toxic water. After Catwoman kicked Oswald into Gotham's sewers, Croc ate him alive. He knocked Catwoman and revealed that he knew Batman was Bruce Wayne and considered him to be a firstborn son of Gotham. Batman fought Croc who died from his injuries and the sewer's toxic waste.