This is the code to unlock everything (all courses, boards, characters, and outfits).
Press Square at the main menu to get to the options menu. Then, hold down all theshoulder buttons (L1 + L2 + R1 + R2) and press DOWN, LEFT, UP, RIGHT, X, CIRCLE, TRIANGLE, SQUARE. A beeping sound will confirm the code.
Redo the code to disable it.