Madden NFL 2005 Cheat Codes for Gamecube

Unlock Madden Cards:
Go to My Madden at the menu, select My Madden, then go to Madden Codes. Enter the case-sensitive code to unlock the corresponding card:

Code - Result:
P67E1I T.J. Duckett (Gold)

Mini-Camp Skill Levels
Complete a challenge in Mini-Camp to open that same skill challenge on the higher difficulty setting.

Stadium Cards: #220-224
Unlock these Cards, and you'll unlock the stadiums, and make them available for exhibition games.

Historic Team Cards: #225-249
Unlock these Cards to make the Historic Teams available at the team select screen.

Cheerleader/Pump Up Crowd Cards: #250-281
These are unlocked by completing each team's Situation in Mini-Camp mode, with the exception of these teams:

#251: Cincinatti Bengals
#260: Dallas Cowboys
#264: San Francisco 49ers
#273: St. Louis Rams

Player Card #104
Get gold in Clutch Kicking mini-camp drill (All-Madden difficulty)

Player Card #147
Get gold in Pocket PResence mini-camp drill (All-Madden difficulty)

Player Card #2
Get gold in Chase and Tackle mini-camp drill (All-Madden difficulty)

Player Card #30
Get gold in Coffin Cornermini-camp drill (All-Madden difficulty)

Player Card #38
Get gold in Ground Attack mini-camp drill (All-Madden difficulty)

Player Card #42
Get gold in Precision Passingmini-camp drill (All-Madden difficulty)

Player Card #52
Get gold in Swat Ball mini-camp drill (All-Madden difficulty)

Player Card #99
Get gold in Trench Fight mini-camp drill (All-Madden difficulty)