Once a petty crook, the Joker fell into a vat of chemicals that turned his skin white, his hair green, and his lips red, like a mad clown. His crimes always involve pranks and jokes that end with twisted punchlines that are only funny to the Joker. He may look like he's clowning around, but he's bad news for Batman and Gotham City!

In his quest for chaos, the Clown Prince of Crime uses a wide variety of deadly clown accessories such as an electric buzzer, a boutonnière that spits acid, and razor-sharp playing cards.