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