Mister Mxyzptlk (/mɪksjɛzˈpɪtəlɪk/ mix-zip-tick, /ˈmɪksɪlplɪk/), sometimes called Mxy, is a fictional impish character who appears in DC Comics' Superman comic books, sometimes as a supervillain and other times as an antihero.
Mr. Mxyzptlk was created to appear in Superman #30 (September / October 1944), in the story "The Mysterious Mr. Mxyzptlk", by writer Jerry Siegel and artist Ira Yarborough.