Joker (Earth-203)

The Joker is the archenemy of Batman.

Biography
For many years the Joker and Batman fought against each other. Eventually, the Joker lost, but Batman didn't kill him, giving him the chance to send Clayface after Selina Kyle, masquerading as him. The Joker also went to Barbara Gordon's house, shooting her point blank, permanently paralyzing her from the waist down. The Joker was soon after caught by police.