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