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