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