I finally figured out where obviously incorrect SSX cheat code listings on sites like GameFAQs (Running Man is from OG, Fuji Board is obviously fake) came from - Official Prima cheat code
SSX 3 Cheat Codes (Part 1 of 3) - YouTube
SSX 3 (original Xbox, 2003) EA Sports 1st Print Factory SEALED Brand New Rare 14633147117 | eBay