Mini-players:
Pause game play, then hold L Y and press Up, Left, Down(2), Right, Down, Up, Left.
Normal size players:
Pause game play, then hold L Y and press Right(2), Up, Down(2), Left, Right, Left.
All apparel and footwear:
Hold down the L and Y button and press Right, Right, Left, Up, Up, Up, Down and
Left at the main menu.