Mister Mxyzptlk

Mister Mxyzptlk is a villain from Superman comics and media.

Origin
Mister Mxyzptlk is, apparently, a troublemaker from another dimension. He sets his sights on tormenting Superman after he gets bored of harassing the humans. However, his actions get him arrested and put on trial in his own dimension.

Powers and Abilities
Mxyzptlk seems to have the power to do anything he wants. He's done everything short of killing Superman.

Goals and Ambitions
While on trial in his own dimension, Mister Mxyzptlk revealed his disliking of Superman. He explains that he hates Superman, because of all Superman's virtues. His hatred may also stem from the fact that Superman always knows how to defeat him. Therefore, his only goal is to cause as much trouble for Superman as possible.