Hold L+Z at the main menu and enter the following codes:

 Unlock all bonus items – Y,B,A,X,X,A,B,Y

Unlock al antics – Y,X,A,B,B,A,X,Y

At anytime during gameplay, hold L+Z and enter the following codes:

Earn 9,999 Gopher Bucks – A, A, X, X, X, X, Y, X