A being from the fifth dimension, Mister Mxyzptlk possesses the ability to warp reality, granting him near-omnipotence in the third dimension. He has proved more than a match for Superman on various occasions; luckily, he seems to be more of a prankster than a malicious entity. If tricked into speaking or spelling his name backwards, he is immediately returned to the fifth dimension for ninety days.
- Mister Mxyzptlk has learned of the legends surrounding the mystical leprechaun, and has become intrigued by the tales of little green men using their powers to hide pots of gold from those that would seek to steal their treasure. This imp from the 5th-Dimension has appeared in Metropolis, where he uses his own powers to enact mischief in the guise of these legendary creatures.
- 5th Dimensional Hair
- Mxy's Membership Man Purse
- Mister Mxyzptlk first appeared in Superman #30 (September 1944)
- Mister Mxyzptlk is voiced by Shanon Weaver.
- Mister Mxyzptlk appeared in DC Universe Online as part of the Seasonal Event, Mxyzptlk's Mischief.
- The pronunciation of Mister Mxyzptlk's name is mix-ye-spittle-lick.
- The Joker once tricked Mxyzptlk into giving him his powers and the entire world was remade in the Joker's image. Fortunately, Mxyzptlk was able to snap out of his trance and convince Superman to save the world again.