Enter "GENERALLEE" as your profile name to get all ATV's.
All tricks
Go to the cheats part of the game and put in FIDDLERSELBOW.
ATV has hydraulics
You go to the cheats menu in the main menu under options and type in BOUNCEBOUNCE and should make a noise that sounds like BOING.
Backflip Without Going Off Jump
Do a wheelie. Preload while doing the wheelie and release Powerup. You will do a backflip without going off a jump.
Bonus ATVs
Successfully complete the ATV Academy Training and Trick Training to unlock the Dimension and Viper ATVs. Win over eight races in arcade mode to unlock the ATC ATV.
Cheat Codes
To unlock the following cheats use the code shown as your profile name :
Max Stats: GINGHAM
Unlock All Challenges: DOUBLEBARREL
Unlock All Riders: BUBBA
Unlock All Tracks: ROADKILL
Unlock All Tricks: FIDDLERSELBOW
Unlock All Vehicles: GENERALLEE
Unlock Champ: REDROOSTER
Fast start
At the beginning of a race, pop a wheelie to get an early jump on the competition.
Quick Turn
When going fast and are trying to turn, use the speed boost while turning. The bike will seem to jump forward.