Start a game, pause, go to Options screen and press one of the codes below to access various cheats:


Invisible Walls : buttons C, C, C, B, A, A, A, B
Curve Ball : buttons B, A, C, B, C, C
Crazy Ball : buttons C, A, B, C, C, B, A, C
Super Power : buttons B, A, B, B, B, B, B, B, B, B
Super Goalie : buttons A, A, A, A, A, B, B, B, B, B
Super Defense : buttons B, B, B, B, B, C, B
Super Offense : buttons A, A, A, A, A, B, C
Dream Team : buttons A, A, B, B, C, C, A, A
Stupid Team : buttons A, B, C, A, B, C
Penalty Shootout: buttons A, B, A, C, A, B


If you did correctly, you'll hear a sound. Now press Start to go back to Main Menu and press A to enter the Cheat Code screen and activate the respective code.