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