I don't understand... I was part of it from the beginning. Well, almost the beginning. The comics, the toys... I was on the cartoon show...
Mister Mxyzptlk is a reality manipulating imp from the 5th Dimension who antagonizes Superman. Not actually evil, he does no long-term damage, although he constantly seeks to pester and prove that he is smarter than the man of steel. He cannot be made to return to his home dimension until he's tricked into saying his own name backwards "Kltpzyxm."
Powers and Stats
Tier: High 2-A
Name: Mr. Mxyzptlk
Origin: DC Comics
Age: Inapplicable. Transcends time.
Classification: 5th-Dimensional Imp
Powers and Abilities: Superhuman Physical Characteristics, Non-Corporeal, Immortality, Reality Warping, Higher-Dimensional Manipulation, Plot Manipulation, Toon Force, Fourth Wall Awareness/Breaking, Spatial Manipulation, Time Manipulation, Matter Manipulation, Energy Manipulation, Mind Manipulation, Magic/5th Dimensional Technology (Depending on the interpretation), Flight/levitation, Telepathy, Teleportation, Telekinesis, Shapeshifting, Power Nullification, Creation
Attack Potency: High Multiverse level+ (A 5th-Dimensional being, who transcends all of time in past, present and future, across all infinite universes of the multiverse, being one across all existence. Compared to him, 3-D beings are spatially flat. Can hold moments of reality as comicbook pages in his hand. When holding his power, Emperor Joker could destroy the entire multiverse)
Speed: Immeasurable (Exists beyond the 4th Dimension, i.e time. Perceives all of time past, present and future across all universe simultaneously. 5D Imps can freely move through time and Hypertime)
Lifting Strength: Immeasurable
Striking Strength: High Multiversal+
Durability: High Multiverse level+
Range: High Multiversal+
Standard Equipment: None Notable.
Intelligence: Nigh-Omniscient (Mr.Mxyzptlk exists as a single entity across all universes, perceiving all of time simultaneously. As the Mxy Twins, he wrote the Encyclopedia Universal, a book containing virtually all information on everything in existence.)
Weaknesses: His comical and lighthearted personality means that he rarely acts seriously or uses a fraction of his true power. Will be banished to the 5th Dimension for up to 90 days if he is forced / tricked to speak or write his name backwards. However, this weakness is self-imposed and can be ignored should Mxyzptlk desire.