i have played mortal kombat where there is a knockout tournament.
then the after you get to the final stages, you have to fight a minotaur
and then you have to fight some skeleton guy called shao khan.
i used to use the character "Smoke" to win the game. It was a robot that would teleport and harpoon and then you could do your combo.
is that the kind of tournament you are talking about?
Can you survive to the end? One game v. one player will advance you to the next round!