Cheat mode:
Press L, B, and A to enter the following codes on the match-up screen in exhibition mode. The numbers in the following list indicate the number of times each button is pressed. After the first part of the code has been entered, press the D-pad in the indicated direction to enable it. Example, to enter 1-2-3 Right, press L, B(2), A(3), Right.

Effect Code
No random fumbles 3-2-1 Right
Unlimited turbo 4-3-2 Right
Ogre field 1-3-2 Right
Snow field 2-2-5 Right
Shadow players 3-1-3 Right