The Joker is Batman's arch foe. His continuing agenda is to humiliate and destroy Batman and his allies.
The Joker is a fictional character, a supervillain who appears in comic books published by DC Comics. He is the archenemy of Batman, having been directly responsible for numerous tragedies in Batman's life, including the paralysis of Barbara Gordon and the death of Jason Todd, the second Robin. Created by Jerry Robinson, Bill Finger and Bob Kane, the character first appeared in Batman #1 (Spring 1940).