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