Do you want to compare Cosmic Boy with Mister Mxyzptlk? Discover the powers, weakness & weapons of Cosmic Boy and Mister Mxyzptlk from Cosmic Boy Biography and Mister Mxyzptlk Biography. Find out all about Cosmic Boy and Mister Mxyzptlk.# Check out how is Cosmic Boy unique and distinct from Mister Mxyzptlk. Discover their love interest, sidekicks, family tree and the movies and games list in which Cosmic Boy and Mister Mxyzptlk have appeared. Find out everything about them here!