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