Welcome to Cheatology, Gamer. You'll never know defeat again!

Enter the following codes at the main menu:

All Bikes - Up, left, down, right, down, down, right, down, down, left, square.
Colin Mackay's Outfit - up, down, right, down, up, right, right, up, square.
Dave Mirra's Outift - up, down, up, down, right, left, up, up, square.
Joey Garcia's Outfit - up, down, up, left, down, right, down, right, square.
Kenan Harkin's Outfit - up, down, left, down, left, up, down, up, square.
Leigh Ramsdell's Outfit - up, down, down, left, down, down, down, left, square.
Luc-E's Outfit - up, down, left, down, left, right, left, left, square.
Mike Dias for Free Play and Proquest modes - up, left, down, right, right, left, up, down, up, right, square.
Mike Laird's Outfit - up, up, down, down, left, right, right, left, square.
Rick Moliterno's Outfit - up, down, up, up, up, up, left, up, square.
Ryan Nyquist's Outfit - up, down, down, left, down, up, up, down, square.
Scott Wirch's Outfit - up, down, right, down, up, right, right, up, square.
Tim Mirra's Outfit - up, down, right, left, left, up, down, up, square.
Todd Lyons' Outfit - up, down, down, right, up, left, left, down, square.
Troy McMurray's Outfit - up, down, left, down, right, left, up, left, square.
Zack Shaw's Outfit - up, down, left, right, down, down, right, down, square