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