Unlock All Characters
At the main menu press L2, R2, L2, R2, Up, Right, Down, Left, L1, R1.
Alternate Sound Effects
At the main menu, press L1, R1, L2, R2, L1, R1, L2, R2, L1, R1. For every time you enter the code, the sound effects for your character will change.
Left Handed Players
When selecting a character, hold SELECT + L2 and press X. Your character will swing left handed.
Alternate ball (Japanese version)
While the swing meter is on-screen before hitting the ball, press L2 + R1 + Triangle. Press Left or Right to change the ball's shape.
Stop Caddie's Talking
Press Start(2) to pause and immediately resume the game. This cuts off the caddie's speech and they will not continue it after the game resumes.
Faster Ball Speed
When The ball is in the air, hold in The X button which will make the ball fly faster and make game play move more quickly.