After either the singles or the doubles championship in the Island Open, Alex will arrive at the dormitories and will escort Ace and Clay to the statue next to the training facility. It will open, revealing a secret stairway. On the other side, Alex will introduce the pair to Mario and Toadsworth, who learned of their success in the Island Open and invite them to the Mushroom Kingdom. After accepting the invitation, all four take a private airplane to the Peach Dome, where Princess Peach will greet them and begin The Peach Tournament.
The Peach Tournament is divided into singles and doubles championships. Each match is 5 sets and 2 games long. Defeating the character in either championship will unlock a star version of that character that can be used in exhibition mode. The order in which the player battles the other characters in the tournaments is predetermined for the first time. Unlike the Island Open, the player may repeat the Peach Tournament again without having to create a new file. After completing the tournament once, the characters (and teams for doubles) will be randomized in subsequent competitions.