At the Main Menu, select Options, then select Unlocks.
Next highlight the cheat that you want to unlock and press A to select it. Enter the corresponding code bellow to unlock your selection. You can enter the code again to turn it off.
Unlock Big Shot Mode
HOWITZER
Unlock Increase Gravity Mode
HEAVYPUCK
Unlocks Invisible Players Mode
INVISIBLEMAN
Unlocks Microsoft All-Stars Team
Blibbet