There are at least four 1-upmushrooms in the game. The first is at the training courts by the sign next to the lake, the second is next to the dormitories, to get it, you must jump into the pope on the right hand side of the courtyard just outside the dorms. The third is in a basket of balls near the right-hand corner of the junior courts and the last one is in the senior tennis courts in the bottom left hand-corner, to get it, you must click on the vending machine in the small fenced -off area. Note: There may be more in the game.