Enter the following password without the quotes as a name on the 'Controller Selection' screen. These codes only work in 'Exhibition Mode'.
Unlock Alien Team: Enter 'ROSWELL'.
Unlock Classic 60's and 70's Players: Enter 'OLDTIME'.
Unlock Small Players: Enter 'OOMPA'.
Unlock Large Players: Enter 'FATTONY'.
Song Select: Start a game in 'Dynasty' mode and then during gameplay pause the game and enter the 'Controller Setup' screen. Select the team that is currently being controlled and press R1 to choose the song to be played when they have possession of the ball.