The origin of 'a winner is you', Pro Wrestling for NES?
Since I didn't own the game, or a NES (only played on consoles at friends houses), I had to cheat on the 'who's missing' part and look up the names of the fighters on wikipedia to jog my memory. They're all there, so I'm guessing you're talking about the referee or camera dude being missing? They're the only other 'characters' I can remember there being.
(Sorry for stalling this by forgetting to put up a game last time, assuming I've got this one right, I'll put one up fast)
--Too Dumb to Quit--