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