NFL Quarterback Club '96 (SNES)

AFC or NFC preseason teams
Press Y, B, Y, B, Y, B at the copyright screen, then select the "Preseason" option.

Black field:
Press Start, Y, Down, Start, Y, Down at the copyright screen.

Bouncing players:
Press Down, Down, Start, Down, Down, Start at the copyright screen.

Enable all codes:
Press Down, Start, A, Y, B, Down at the at the copyright screen.

Iguana and Acclaim teams:
Press Down, Y, Down, Down, Y, Down, at the copyright screen.

Invisible opponent:
Press Start(2), B, Start(2), B at the copyright screen.

More fumbles:
Press A, Y, B, A, Y, B at the copyright screen.

No fumbles:
Press B, Y, B, Y, B, Y at the copyright screen.

Slippery field:
Press Y(8) at the copyright screen.

Strong team:
Press B, Y, Down, Start(2) at the copyright screen.

Tackles after play ends:
Press B, Y, Start(4) at the copyright screen.

Unlimited turbo runs:
Press B, Y, A(2), Y, Start at the copyright screen.

Up and over dives:
Press A, Y, Start, Start, Y, B at the copyright screen.

Weak team:
Press Start, Y, Down, Y, Start(2) at the copyright screen.