Shrek The Third
10,000 Gold Coins
At the gift shop, press Up(2), Down, Up, Right, Left.
Secret Costume 1
At the main menu, press Left(2), Up, Right(2), Up, Left to unlock Secret Costume 1.
Secret Costume 2
At the main menu, press Right(2), Down, Left(2), Up, Right to unlock Secret Costume 2.