Here are some:
Enter the codes at the Options screen. Hold L1 + L2 + R1 + R2, then enter the code. Repeat the code to disable it.
Cheat mode Down, Left, Up, Right, X, Circle, Triangle, Square
All course hints Circle, X, Circle, X, Circle, X, Circle, X
Running man mode Square, Triangle, Circle, X, Square, Triangle, Circle, X
Max Out Stats X, X, X, X, X, X, X and Square
All players and courses Down, Left, Up, Right, X, Square, Triangle, Circle
Mallora board Circle, Circle, Circle, Circle, Circle, X, Triangle, Square