HERE ARE CODE THAT REALLY WORK ON XBOX 360!
Play with Matt Hoffman
1) From the main menu, go to the cheats menu then enter: the_condor
2) In the skaters menu, select the category of the secret skaters, then Matt Hoffman (the BMX champion!).
"Special" gauge activated
1) From the main menu, go to the cheats menu then enter: uronfire
2) During the game, put Pause and go to the other cheats menu.
3) Put the Special option "on".
Perfect Grind
1) From the main menu, go to the cheats menu then enter: grindXpert (case sensitive)
2) During the game, put Pause and go to the other cheats menu.
3) Put the grind option "on".
4) Slide on rails or keep one's balance on slopes: your balance is perfect during Boardslides and Nose Stalls (even if the "cursor" moves).
Perfect Manual
1) From the main menu, go to the cheats menu then enter: 2wheels!
2) During the game, put Pause and go to the other cheats menu.
3) Put the manual option "on".
4) Your balance is perfect during Noses and Switches Manuals (even if the "cursor" moves).
Perfect Skitch
1) From the main menu, go to the cheats menu then enter: h!tchar!de
2) During the game, put Pause and go to the other cheats menu.
3) Put the skitch option "on".
4) Then, hang on to a car, to make perfect Skitchins and Switches Skitchins (even if the "cursor" moves).
Lunar Gravity
1) From the main menu, go to the cheats menu then enter: 2them00n (with two zeros)
2) During the game, put Pause and go to the other cheats menu.
3) Put the moon gravity option "on".
4) Your skater being lighter, he makes bigger jumps.