NFL Blitz 20-02 Cheats

At the versus screen, press Turbo, Jump, and Pass to change the icons below the helmets. The numbers in the following list indicate the number of times each button is pressed. After the icons have been changed, press R to enable the code. If you entered the code correctly, you will see the name of the code and hear a sound. For example, to enter 1-2-3 R, press Turbo, Jump(2), Pass(3), R. Note: More then one code may be activated per game.
 
Result Code
Infinite turbo 4-3-2 R
No random fumbles 3-2-1 R
Shadow players 3-1-3 R
Ogre field 1-3-2 R
Snow field 2-2-5 R

Press L, L, L, L, B, B, B, A, A, Right on the match-up screen in exhibition mode.

You enter these codes in the VS screen.
321 - No Random Fumbles
432 - Infinite Turbo
132 - Ogre Field
313 - Shadow Players
225 - Snow Field