FIFA Soccer 64 Cheats & Tips

If you do a rainbow kick and then do the header button you can do a bicycle kick.

In the EA Sports screen, press A, B, A, B, B, B, A, Z and now you can change the FIFA colors and edit players.

Hot Potato Mode: C, R, A, B, B, R, L, A, B, A, B, R
Invisible Walls: A, B, B, A, C, A, B, A, B, B, A
Laser Ball: L, A, C, R, B, A, L, L
Giant Player: B, A, B, A, R, B, A, B, B, A, R
Big Ball: B, C, B, A, L, L, A, B, A, L, L
Metallic Men: B, A, R, C, L, B, A, B, B, A

During a match, pause the game and access the Controller Select option. Then move the controller icon under the other team's flag. When you go back to the game, dribble the ball into that team's own goal. Repeat this process until you have enough points, and before the match ends, make sure you switch back to the winning team. You are assured to win every time!