The Joker

The Joker was an evil/insane criminal who was the arch enemy of Batman.

Early Life
The origins of the Joker is unknown and constantly changing due to S Man controlling Batman's universe. One re-occurring version of Joker's history depicts him as a man who falls into a vat of chemicals due to being scared by Batman and as such turns his hair green, his lips red, and his skin white. The man went insane at this and became the biggest criminal in all of the city.

Mid-Life
Joker has repeatedly killed innocent people while also battling Batman and trying to kill him to. Through the years, Joker has died multiple times and had many battles with Batman. Two events stand out among the rest. The Joker is responsible for killing Batman's sidekick and also permanently injuring another sidekick and then trying to drive her father insane with the fact that her daughter is injured. Most of the time; Joker has been stopped by Batman and locked up; only to escape and reek havoc again.

Legacy
At some point, S Man decided to do away with Joker and he was killed a final time either by poisoning or accidental death. Gangs and criminals of all sorts honored The Joker and even followed in his footsteps. Batman still considers him to be his arch enemy and still thinks that he will return someday. For more detailed information click the following link: http://batman.wikia.com/wiki/The_Joker#Criminal_Career.

Powers
The Joker had no powers but was capable of many things:
 * Intelligence - The Joker was pretty smart and skilled at building lethal machines.
 * Hand-to-hand combat - The Joker can hold his own in a fight for a short time.
 * Weapons - The Joker has a VERY wide range of lethal weapons at his disposal.
 * Henchman - The Joker at some points had henchmen which were willing to do anything for him.

Weaknesses

 * Weapons - The Joker was only human and could be hurt or killed by weapons if he wasn't careful.
 * Himself - With insanity as one of his problems, The Joker was sometimes his own enemy.
 * Powerful Enemy - If put against a powerful enemy, the chances of Joker winning are a bit low.