Amped Codes - 
  Level Choose, all costumes, gear, and snowboards.:
 Choose "Options" at the main menu,
  then "Cheats". Submit GimmeGimme (this is a case sensitive
  code). You will hear a sound if you have entered the code correctly. Press 
 to exit out of
  the cheat menu.
 to exit out of
  the cheat menu.
  
Perfect jumps:
 Choose "Options" at the main menu,
  then "Cheats". Submit StickiT (this is a case sensitive
  code). You will hear a sound if you have entered the code correctly. Press 
 to exit out of
  the cheat menu.
 to exit out of
  the cheat menu.
  
Super spins:
 Choose "Options" at the main menu,
  then "Cheats". Submit WhirlyGig (this is a case sensitive
  code). You will hear a sound if you have entered the code correctly. Press 
 to exit out of
  the cheat menu.
 to exit out of
  the cheat menu.
  Son Goku.
  
Super statistics:
 Choose "Options" at the main menu,
  then "Cheats". Submit BigsteeZ (this is a case sensitive
  code). You will hear a sound if you have entered the code correctly. Press 
 to exit out of
  the cheat menu.
 to exit out of
  the cheat menu.
  
Low gravity:
 Choose "Options" at the main menu,
  then "Cheats". Submit MegaLeg (this is a case sensitive
  code). You will hear a sound if you have entered the code correctly. Press 
 to exit out of
  the cheat menu.
 to exit out of
  the cheat menu.
  Son Goku.
  
Unlock Raven:
 Choose "Options" at the main menu,
  then "Cheats". Submit RidinwRaven (this is a case sensitive
  code) to unlock Raven, the girl from the original Xbox tech demos and a Xbox
  snowboard. You will hear a sound if you have entered the code correctly. Press 
 to exit out
  of the cheat menu.
 to exit out
  of the cheat menu.
  Mx4LiFe74.
  
Unlock Steezy:
 Choose "Options" at the main menu,
  then "Cheats". Submit ChillinwSteezy (this is a case
  sensitive code). You will hear a sound if you have entered the code correctly. Press 
 to
  exit out of the cheat menu.
 to
  exit out of the cheat menu.
  Son Goku.
  
Disable tree collisions:
 Choose "Options" at the main menu,
  then "Cheats". Submit buzzsaW (this is a case sensitive
  code). You will hear a sound if you have entered the code correctly. Press 
 to exit out of
  the cheat menu.
 to exit out of
  the cheat menu.
  Marcus Reddish.
  
Bouncy terrain:
 Choose "Options" at the main menu,
  then "Cheats". Submit MegabOUnce (this is a case sensitive
  code). You will hear a sound if you have entered the code correctly. Press 
 to exit out of
  the cheat menu.
 to exit out of
  the cheat menu.
  
Harder to do flips and spins:
 Choose "Options" at the main menu,
  then "Cheats". Submit KeepnReal (this is a case sensitive
  code). You will hear a sound if you have entered the code correctly. Press 
 to exit out of
  the cheat menu.
 to exit out of
  the cheat menu.
  
Free movement:
 Choose "Options" at the main menu,
  then "Cheats". Submit ZiPster (this is a case sensitive
  code). You will hear a sound if you have entered the code correctly. Press 
 to exit out of
  the cheat menu. You can move anywhere quickly, even going uphill.
 to exit out of
  the cheat menu. You can move anywhere quickly, even going uphill.
  
View programmer replays:
 Submit the "Replay Theater" and
  highlight "Hard Disk". Press 
 until "Game
  Disc" appears to find replays generated by the programmers. To play one
  of those levels, Choose a replay then highlight "Watch Replay".
  Press
 until "Game
  Disc" appears to find replays generated by the programmers. To play one
  of those levels, Choose a replay then highlight "Watch Replay".
  Press 
 until you see "Challenge" appears, then Choose
  it.
 until you see "Challenge" appears, then Choose
  it.