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