Enter the following at the Cheats menu:

Stiffcomp       Unlock everything  Neverboard      Unlock all boards for selected skater  Juice4me        Max stats  Rollitall       FMV sequences   WeEatDirt       All created skaters   

Unlock Neversoft team Members:

Enter the following as Created Skater Names…

    Aaron Skillman (also by entering Aaron, Skillman, or ARS)  Alan Flores  Andrew Rausch (also by entering Jujy)  Andy Nelson  Brian Jennings (also by entering BDJ or Brian)  Captain Jennings (also by entering Cap'n Jennings or Capn Jennings)  Chad Findley (also by entering Stallion or Doofus)  Chris Glenn  Chris Rausch (also by entering Team Chicken, CJR, or Rausch)  Chris Ward  Connor Jewett  Darren Thorne (also by entering Darren or Thorne)  Dave Cowling  Dave Stohl  Edwin Fong (also by entering Maya's Daddy)  Gary Jesdanun (also by entering Garvin or Garvin Jesdanun)  Henry Ji  James Rausch (also by entering My Jamie)  Jason Uyeda  Jeremy Anderson  Joel Jewett  Johnny Ow  Junki Saita (also by entering Kage)  Kevin Mulhall (also by entering Guilt Ladle)  Lisa Davies  Mark Scott (also by entering Hi Ben)  Matthew Day  Mick West  Mike Ward  Nicole Willick  Noel Hines (also by entering Noel or Hines)  Nolan Nelson  Paul Robinson  Pete Day  Rachael Day  Ralph D'Amato  Ryan McMahon  Sandy Jewett  Scott Pease (or by entering Scott Pease, Spease, or Cheesy Peasey)  Steve Ganem  Steven Rausch (or by entering Wevenowski)  Trey Smith  William Pease (or by entering Wild Bill)   

Unlock X-ray skater:

Beat all 54 goals and get gold on all the competitions with 2 different skaters.

Unlock Wolverine:

Beat all 54 goals and get gold on all the competitions with 4 different skaters.

Thanks to Revolution readers crazy_skater, michael, Nick, sunny, Jacob Buckles,

Slacker, Laurent, Mardy J. Superfly, M D, and Ben Jenkins!