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