The Joker

A man who fell into a vat of chemicals and became The Joker. Batman battled him and put him in Arkham Asylum. Joker corrupted Dr. Harleen Quinzel and created a secret war in New Gotham, but Batman stopped him, Joker sent Clayface to kill Catwoman and shot Barbara Gordon. The Joker is locked up in a prison far away from New Gotham.