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