Joker

Whenever you see this face, you should easily recognize him. That's right, he's the Joker! Joker is the most known Batman villain ever! Even, if he came a little later than other Batman villains. Before Joker became like this, he was the villain named Red Hood. While, he was as Red Hood, he fell into a vat of chemicals and the chemicals bleached his skin white, dyed his hair green and his lips ruby red, driving him insane. Since Joker knows Batman's one and only rule: never kill, he tries to make Batman kill Joker, knowing that he will continuously kill. Joker doesn't really have any superhuman powers, but he uses gadgets just like Batman does. His most known weapons are Joker gas, a deck of bladed playing cards, cyanide stuffed pies, an electric joy buzzer, etc. The Joker has genius-level intelligence, he is an expert in chemistry and engineering, and he is skilled in hand-to-hand combat.