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