Bonus Points:
During gameplay Pause the game and while holding R2 enter the following:
Circle, Circle, Circle, Right, Circle, X, Square

Unlock Fat Player:
During gameplay Pause the game and while holding R2 enter the following:
X, X, X, X, Left, X, X, X, X, Left, X, X, X, X, Left

Unlock Thin Player:
During gameplay Pause the game and while holding R2 enter the following:
X, X, X, X, Square, X, X, X, X, Square, X, X, X, X, Square

Unlock B/W Mode:
During gameplay Pause the game and while holding R2 enter the following:
Left, Down, Circle

Unlock Dance Mode:
During gameplay Pause the game and while holding R2 enter the following:
Left, Down, Right