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