For all courses, boards, and 1 extra boarder:
D = Digital Stick
A = Analog Stick
C = Yellow Buttons
At the Main Menu, press:
D-Down, D-Up, A-Down, A-Up, C-Down, C-Up, L, R, Z, A-Left, C-Right, D-Up, B, A-Right, C-Left, Start
You know it works when you hear a "Yeah!" after pressing Start...
Type in the following codes during gameplay:
Hold A, press Down rotate the stick 360 degrees twice and hold Down, now you can release A-Do jam's moonrock
Hold A and push Left, Right, Neutral Position, Up, Down and hold Down and release A-Do nancy's limbo.