Cheat Codes
Enter these codes while the game is paused. After you've entered the desired code, exit the Options menu and highlight "Resume Game". Press Square and it will appear. You'll need to start a new game to enable the options you've selected.

CURVE BALL: Triangle, Square, X, Triangle, X, X
CRAZY BALL: X, Square, Triangle, X, X, Triangle, Square, X
SUPER POWER: Triangle, Square, Triangle(8X)
SUPER GOALIE: Square(5X), Triangle(5X)
INVISIBLE WALLS: X, X, X, Triangle, Square, Square, Square, Triangle
SUPER OFFENSE: Square(5X), Triangle, X
SUPER DEFENSE: Triangle(5X), X, Triangle
SHOOTOUT: Square, Triangle, Square, X, Square, Triangle
STUPID TEAM: Square, Triangle, X, Square, Triangle, X
DREAM TEAM: Square, Square, Triangle, Triangle, X, X, Square, Square

Various Codes
Enter these codes in the options menu for your game. After entering them, exit the game and return to the options menu. If you have a memory card in when you go to the main options menu, you will not have to enter the codes again; it will save them for you.
Dynamic Duo - STXSTTTS - Batman and Robin
Default Color Pallete - STXSTTTX - ?
Invisible - STXSTTXS - just hair, shorts, shoes, numbers
Formal - STXSTTXT - tuxedoes as uniforms
Federation - STXSTTXX - Data and Spock
STXSTTSS - EA CUSTOM TEAMS
Oktoberfest - STXSTTTT

Secret Intro
While the introduction is playing, press Square, Triangle to view some bonus intros.