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