The Joker is truely one of the best super villians of all time.

Not much is known about his back story but some say that he was a former circus clown that was dropped on his head as a baby and was never the same since. This was mostly credited to the fact that his smile was three times bigger than any normal humans should be. I mean seriously look at that picture (picture pending) his smile is so big it would make Steven Tyler jelly. But he has been on many quests to kill Batman. His most notable endevour was the battle of Helms Deep where he enlisted an entire army of orcs to try and storm Wayne Manor. He failed of course luckly because Batman has just finished his orc punishing spray that if it came into contact with any orc it would instantly turn them into a newt.