| Arthur Fleck was a petty crook who fell into a vat of chemicals that bleached his skin, turned his hair green and left a permanent grin on his face, Joker, Batman's nemesis, is a homicidal maniac who seeks to cause as much death, destruction and suffering as possible. He's poisoned the Gotham reservoir, rained down glass, murdered Robin, commissioner Gordon's wife and raped his daughter, Barbara, after paralysing her. Joker developed regenerative healing abilities by jumping into a dionesium pit. |
