This isn't really a code, but if you collect all the tapes, then you will get a special character named " Officer Dick ". His moves are the Neckbreak Grind: Left, Right, Triangle. Yeeehaw Frontflip: Down, Up, Circle

If you play a career with him, and get all 3 golds in the 3 competitions, then you will get to watch a video of a bunch of old dorks trying to skate.