Cheat: Extra Teams and Points
When you turn on the game, wait for the press start screen to fully load. Then, hold select, alternate pressing "L" and "R" while the select button is still being held. When the main menu eventually appears, you should hear "It's in the game." This gives you two extra teams in the play now mode, and 1000 points to use in the create a player mode!
Hint: Zamboni at Start
Hold L+R while turning on the game and a zamboni will drive by.