Cheat mode
At the main menu, hold L1 + L2 + R1 + R2 + Triangle + Square + Circle to unlock all bonuses.
Maximum speed, power, tackling, tricks, etc.
At the main menu, hold L1 + Triangle and press Left(3), Up, Down(2).
All apparel
At the main menu, hold L1 + Triangle and press Up(2), Left, Up(3), Down, Left.
All apparel and footwear
At the main menu, hold L1 + Triangle and press Right(2), Left, Up(3), Down, Left.