While buying a pack of maddencards hold L1,L2,R1,and R2 while still
holding L1,L2,R1,and R2 reset your Playstation two.
(works the best while starting a new season franchise or whatever
your're playing so your game doesn't get erased once you
reset your Playstatioh two.)

Infinite creation points

Create a player, then go to "Edit Player" at the roster screen. Press Up or
Down to choose the player you want to edit. Press Right to get to the speed
category. Press X, then press X again.

Challenging a play

You cannot challenge a play on your own, even though the computer will
sometimes challenge a play. On very rare occasions you will be asked after a
play if you would like to challenge a questionable call. It is usually due to a
player running out of bounds.

Touchdown celebrations

Hold one of the following button combinations immediately after scoring a
touchdown to perform the corresponding touchdown celebration:

Hip thrust

Hold L1 + Square

Jump spike

Hold L1 + Circle.

Say a prayer

Hold L1 + Triangle.

Spike football

Hold L1 + X.

Shoulder shake

Hold L1 + R1.

Slam dunk

Hold L1 + R2.