Goto the "Versus Screen" and press the following:
turbo, jump, pass
Now enter a code below according to the following:
1st number= the number of times to press turbo
2nd number= the number of times to press jump
3rd number= the number of times to press pass
Then press the direction
Example:
Unlimited Turbo: Turbo(x5) Jump(x1) Pass(x4) then press Up

Faster Turbo Running: 0 3 2 Left
Invisible: 4 3 3 Up
Super Blitz: 0 4 5 Up
Long Field Goals: 1 2 3 Left
Out of Bounds Off: 2 1 1 Left
Super Fast Passing: 2 5 0 Left
Stadium Off: 5 0 0 Left
Late Hits 0 1 0 Up
Team Plays On: 1 0 0 Up
Receiver Name Off: 1 0 2 Right
Hilight Invisible Receiver: 3 3 3 Left
Big Ball: 0 5 0 Right
Big Head Mode: 2 0 0 Right
Bigger Head Mode: 0 4 0 Up
No Head Mode: 3 2 1 Left
No Head Team: 1 2 3 Right
Old Stadium(day): 5 0 1 Up
Stadium(day): 5 0 1 Down
Stadium(city): 5 0 1 Left
Old Stadium(night): 5 0 2 Up
Stadium(night): 5 0 2 Down
Old Stadium(snow): 5 0 3 Up
Stadium(snow): 5 0 3 Down
Grass Field: 3 0 0 Up
Asphalt Field: 3 0 1 Up
Small Player Team: 3 1 0 Right
Big Head Team: 2 0 3 Right
Big Player Team: 1 4 1 Right
Dirt Field: 3 0 2 Up
Astro-Turf Field: 3 0 3 Up
Snow Covered Field: 3 0 4 Up
Fog: 0 3 0 Down
Thick Fog: 0 4 1 Down
Clear Weather: 2 1 1 Left
Rain: 5 5 5 Right
Snow: 5 2 5 Down
Night Game: 0 2 2 Right
View FG Percentage: 0 0 1 Down
View Hang Time(punt): 0 0 1 Right
Interceptions Off: 3 4 4 Up
Random Fumbles Off: 4 2 3 Down
First Downs Off: 2 1 0 Up
Punting Off: 1 5 1 Up
Offense Power Up: 3 1 2 Up
Blocking Power Up: 3 1 2 Left
Defense Power Up: 4 2 1 Up
Teammates Power Up: 2 3 3 Up