Mario Bros- no ending, so never beat it, lol
SMN0 Beat it ONCE back in the 80's. I'm pretty sure I used warp zones. I got to Bowser many, many times but always died. Ran under him one time...one of the most excited I ever got while gaming, haha
Beat SMB 2 and 3
Never played anything since, though I have a couple games on the Wii-U I'll hopefully get to play someday.