There are three basketball courts on the world map. Upon entering one of them, Fred will be challenged by Hard-Head Harry. The rules are very simple: each of the two challengers must try to catch the ball and throw it into the basket, made up of a pelican. Each shot is worth two points. After each shot, the game restarts from the center of the court and the ball is awarded to the player who suffered the shot. When the time runs out, that is one minute, the player with the most points wins. When Harry has the ball, you'll have to try to steal it before he can make a shot. Approach him and press 
to hit him. Once you have won the ball, you will instead have to run towards the opponent's basket (don't worry: Fred will dribble automatically) avoiding any attacks from Harry and, when you are close, throw the ball by pressing to try to make the basket. Even if the pelican closes its beak at regular intervals, you will almost always succeed. Although Harry's speed and behavior will change slightly over the three games, the strategy is always the same and winning should be easy. Furthermore, in case of defeat, you will have the opportunity to return to the basketball court and try again.
By winning these games you will get three very useful prizes, the hoppasaurus, the wings and the diving suit, which you can then use in the levels by pressing 
to call Gazoo and then select the desired skill. In fact, it is better to face these basketball games as soon as possible. Note: a tie equals a defeat. To get the prize you absolutely have to win.