After winning the "League Championship", defeat the "World Stars". The bonus teams will now be available.

Big Head Mode

To increase the size of every player on the pitch's head then simply enter the following code on the title screen: Top C, Top C, Bottom C, Bottom C, Left C, Right C, Left C, Right C, B, A, and then hold Z and press Start.

Secret Teams

To get six new teams you can do two different things. These are winning the league or entering the following code on the title screen: Up, L, Up, L, Down, L, Down, L, Left, R, Right, R, Left, R, Right, R, B, A and then hold Z and press Start.