Mario has just beaten Bowser and has just rescued Peach. Mario and her return to the

Mushroom Kingdom and live in peace for awhile. One month later, Mario, and his friends and enemies,including Bowser, recieve a letter from a mysterious person who invites them to a tournament. They all accept, but they don't know they're in it and they have to fight each other.

Mario is tired of fighting his friends,so he

challenges the mysterios person. If he wins, Mario stays in the tournament forever. If Mario wins, he and his frieds go back to the Mushroom Kingdom. Mario wins, then he and his friends and enemies leave the stadium and go back to the Mushroom Kingdom.