There are seven unlockable bonus tournaments in Mario Tennis Open for the Nintendo 3DS.
Here are the tournaments you can unlock, and how to unlock them.
1-Up Mushroom Cup – Win all four cups of the World Open
Banana Cup – Win the Flower Cup tournament
Champions Cup – Win the Banana Cup tournament
Final Cup – Win the Shell Cup tournament
Flower Cup – Win the Mushroom Cup tournament
Ice Flower Cup – Win the 1-Up Mushroom Cup tournament
Shell Cup – Win the Ice Flower Cup tournament