Press L, R, and A (Juke, Turbo, and Hurdle) to change the icons below the helmets on the versus screen. The numbers in the following list indicate the number of times each button is pressed. After the icons have been changed, press the D-pad in the indicated direction to enable the code. The name of the code and a sound will confirm correct code entry. Example, to enter 1-2-3 Left, press L, R(2), A(3), Left.

Effect -> Code
Extra time after plays -> 0-0-1 Right
No CPU assistance1 -> 0-1-2 Down
See more field1 -> 0-2-1 Right
Big feet -> 0-2-5 Left
Big shoulders -> 0-2-5 Right
Chimp mode -> 0-2-5 Up
Classic NFL Blitz ball -> 0-3-0 Left
Chrome ball -> 0-3-0 Left
Fast running speed -> 0-3-2 Left
Indians team -> 0-4-5 Left
Super blitzing -> 0-5-4 Up
Tourney mode in two team game -> 1-1-1 Down
Super field goals -> 1-2-3 Left
Clear weather -> 1-2-3 Right
Cowboys team -> 1-3-5 Left
No punting -> 1-4-1 Up
Huge head for ball carrier -> 1-4-5 Left
Big head for ball carrier -> 2-0-0 Right
Big head for team -> 2-0-3 Right
No first downs -> 2-1-0 Up
Allow stepping out of bounds -> 2-1-1 Left
More code entry time -> 2-1-2 Right
Always QB (two humans on team) -> 2-2-2 Left
Always receiver (two on team) -> 2-2-2 Right
Ground fog -> 2-3-2 Down
Fast passes -> 2-4-0 Left
Midway team -> 2-5-3 Right
Rollos team -> 2-5-4 Up
Bilders team -> 3-1-0 Up
Smart CPU teammates -> 3-1-4 Down
No target receiver highlight -> 3-2-1 Down
Noftle mode -> 3-2-5 Up
Extra offense plays -> 3-3-3 Down
Neo Tokyo team -> 3-4-4 Down
More fumbles -> 3-4-5 Up
Showtime mode -> 3-5-1 Right
No interceptions -> 3-5-5 Up
Crunch Mode team -> 4-0-3 Right
Power-up offense -> 4-1-2 Up
Unlimited turbo -> 4-1-5 Up
Power-up defense -> 4-2-1 Up
Brew Dawgs team -> 4-3-2 Down
Gsmers team -> 5-0-1 Up
Power-up linemen -> 5-2-1 Up
No random fumbles*** -> 5-2-3 Down
Armageddon team -> 5-4-3 Right
No replays -> 5-5-4 Right
Snowy weather -> 5-5-5 Left
Rainy weather -> 5-5-5 Right

*** means: Two player agreement required