Cheats for NFL Blitz 2000 (GBC)

At the match-up screen in exhibition mode, press Start, B and A the indicated number of times.
ie: 2-3-1-Up means Start, Start, B, B, B, A, Up.

0-1-3-Up Infinite Turbo
2-1-0-Up No First Downs
3-1-2-Down No Fumbles
2-3-3-Left No Interceptions
1-3-1-Up No Punting
3-2-1-Up Power Up Defense
3-1-2-Up Power Up Offense
2-3-3-Up Power Up Teammates
3-3-3-Down Secret Plays
3-1-2-Right Super Passing