Unlock Mummies Team:
Use a Playstation 2 Memory card that has a saved game file from a EA Sports Racing Game

Unlock Dodge City Stadium:
Use a Playstation 2 Memory card that has a saved game file from a EA Sports Football Game

Unlock Marshals Team:
Use a Playstation 2 Memory card that has a saved game file from a EA Sports Football Game

Unlock Nile High Stadium:
Use a Playstation 2 Memory card that has a saved game file from a EA Sports Racing Game

UNLIMITED JOHN MADDEN Card #298:
Easy way to Get Multiples of cards
First of all you have to star a profile and play games to get tokens. Then buy packs of cards. Now start another profile and do the same. Then save all the data. Now go to the trade screen and trade which card you want from the second profile to the first. Its best to trade three cards for one and then save the first profile but don't save the second profile. Now turn the power off. And turn it back on.

UNLIMITED JOHN MADDEN Card #298:
How to get JOHN MADDEN #298 every time you buy a pack of Madden Cards. First you need all 329 Madden Cards. Then pick a Madden Card you don't want, like CHEERLEADER CARD and sell all the cards you have for it till you have zero for that card. Then start buying Madden Cards, each time you buy a pack of Madden card you will receive a JOHN MADDEN #298. Once you have 15 JOHN MADDEN #298, Then sell back 14 of them. If you keep buying cards after 15. It will put you back to zero JOHN MADDEN #298.
Special Madden Comment:
Play Madden 2002 on a holiday (holiday on your system calendar) and Madden will comment about it.

Pennants:
Get a "Gold" in the following tasks to unlock the corresponding pennant:
#3: All-Madden Chase and Tackle drill.
#28: All-Madden Coffin Corner drill.
#36: All-Madden Ground Attack drill.
#40: All-Madden Precision Passing drill.
#52: All-Madden Swat Ball drill.
#96: All-Madden Trench Fight drill.
#58: All-Madden Clutch Kicking drill.
#16: All-Madden Pocket Presence drill.
#194: Chase and Tackle drill.
#195: Ground Attack drill.
#197: Clutch Kicking drill.
#199: Swat Ball drill.
#208: Pocket Presence drill.
#209: Trench Fight drill.
#210: Precision Passing drill.
#211: Coffin Corner drill.

Banquet:
Goto the main lemur that is on the drum where all the food lies. Talk to him 10 times in a row to earn food. This can only be done 2 times.

Flying Bird Mini-game:
When you are in level 3, go into the right subway entrance to find one of the arcade games.

Power Ups:
While playing, pause the game. Press B, A, A, B, Y, L, X, R, L.

Get Hex Character:
Finish the game with Sid, Chops & Zero-G

Get Tek 9 Glider:
Finish the game using any character

Get All characters:
After pausing the game Hold L and press X, B, Left, Y, Right, Right

Never Get Hit:
After pausing the game Hold L and press X, B, B, Left, Left, Y, B

Get Fruit for entire race:
After pausing the game Hold R and press B, X, Left, Left, Y

Get 50 Balls:
After pausing the game Hold L and press Up, X, B, Y, Left, left

Unlock Tremmel King, Roscoe, Hex, Gex, Tek-9, and Sydner:
To unlock Tremmel King get all 3 shortcut medals in all of the 8 levels. To unlock Roscoe get 20 Hex Bux in all 8 levels. To unlock Tek - 9 beat the game with any character. To unlock Sydner beat all the levels in the time challenge. To unlock Hex you must beat the game with all 3 original characters (Chops, Zero - G, and Sid). To unlock Gex you must get all the status decals.

Skip Level:
Pick the Electro-Cosh on the Weapons Select screen and press Left Trigger, Right Trigger, Left Trigger, Right Trigger, A, A, B, B, X, B.. Must be a game in progress to work

Be Invincible:
Pick the Electro-Cosh on the Weapons Select screen and press Left Trigger, Right Trigger, Left Trigger, Right Trigger, A, B, B, A, X, Y

Pick Level:
Pick the Electro-Cosh on the Weapons Select screen and press Left Trigger, Right Trigger, Left Trigger, Right Trigger, A, A, B, B, X, X.

Unlimited Ammo:
Pick the Electro-Cosh on the Weapons Select screen and press Left Trigger, Right Trigger, Left Trigger, Right Trigger, A, B, B, A, X, X.