Before you choose your team, hold down B and push right.  Your selection should switch sides.  Now you can choose the team you play against and their line up (don't push A or you'll be them).  After you choose the team, hold B and push LEFT and now you may choose your team.

Highlight FIGHTING on the Options screen, then hold L and press C-Right, C-Left, C-Left, C-Right, C-Down, C-Up, C-Up, C-Down, C-Left, C-Right, C-Right, C-Left, C-Right, C-Left.

A line of numbers will appear at the bottom of the screen if the code was entered correctly. This code has to be entered every period and will cause a fight to break out almost every time you check someone.

At the Options screen, hold C-down and press R to access a new menu. To use it, enter one of the codes below.

• Change announcer voices: hold C-Up then press R.
• Change body size: hold C-left then press R.
• Change head size: hold C-down then press R.

To create an invisible team, perform the following.

• Start any form of a game with any team.
• After you have started, press start and click replay.
• Press R twice and while the player is flashing press Z.
• Then press L once and while the player is flashing press Z.
• Then press L seven times and while the player is flashing press Z.
• Then press start twice and your whole team should be invisible except for the goalie.

This cheat may need to be entered more then one time for it to work.