Cheats:
Play as King or Duke
Press Up(twice), Down(twice), Left, Right, L1, R1 at the main menu. A sound will confirm correct code entry.
All courts
Press Up(twice), Down(twice), Left, Right, Left, Right at the main menu. A sound will confirm correct code entry.
All gear
Press Left, Right, Circle, Left, Right, Circle, Up, Down at the main menu. A sound will confirm correct code entry.
Win one match to win tournament
Press Circle, Left, Circle, Right, Circle, Up, Circle, Down at the main menu. A sound will confirm correct code entry.
Unlockables:
Play as Duke
Select Tournament mode and win the singles matches without losing to the CPU and get a flawless “C” or better rank. When challenged by Duke, defeat him to unlock him as a playable character.
Play as King
Select Tournament mode and win the singles matches without losing to the CPU and get a flawless “D” or worse rank. When challenged by King, defeat him to unlock him as a playable character.
Frying Pan racket
Get three strikes in a row in the Pin Crusher mini-game.
Guitar racket
Defeat King or Duke in a SPT final.
Tambourine racket
Make a total of 100 lob shots.
Wooden racket
Win King Of Players mode.