Select the "Extras" option at the main menu, then select "Cheat Codes". Enter one of the following codes:

Code - Effect

MYPRECIOUS - All boards
FREEVISIT - All championship locations unlocked
GOINGDOWN - All Leaf Sliding locations unlocked
NICEPLACE - Art Gallery
DONTFALL - Bonus mission "Legendary Wave" in "Pen Gu North"
TOPFASHION - Customizations for all characters
TINYBUTSTRONG - Play as Arnold
SURPRISEGUEST - Play as Elliot
SLOWANDSTEADY - Play as Geek
IMTHEBEST - Play as Tank Evans
KOBAYASHI - Play as Tatsuhi Kobayashi
THELEGEND - Play as Zeke Topanga
WATCHAMOVIE - Video Gallery and Spen Gallery
MULTIPASS - All Multiplayer Levels
ASTRAL - Astral Board
MONSOON - Monsoon Board
TINYSHOCKWAVE - Tine Shockwave Board