Cheat mode:
Hold L1 + L2 + R1 + R2 at the main screen. Then, enter one of the following codes:

Big head mode:
Square, Circle, Circle, X, Triangle, X, Square, Circle.

View credits:
Circle, Square, Triangle, Circle, X, Triangle, Triangle, Square.

Bonus stadium:
Square, Circle, Square, Triangle, Triangle, Circle, X, X.

Hidden teams:
X, Triangle, X, Square, Circle, Square, X, Triangle.

Win match:
X, Triangle, Triangle, Circle, X, Square, Circle, Triangle. Pause game play to win the match.