Master code
Hold [L] + [R] and press [Right]x4
at the main menu to unlock all tracks, characters, and snowmobiles.
All characters
hold [L] + [R] and press [Down]x4 at
the main menu.
All parts
Hold [L] + [R] and press [Left]x4 at
the main menu.
All tracks
Hold [L] + [R] and press [Up]x4 at
the main menu.