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