Motocross Mania 3 Cheats...
All Armour
At the main menu, press Up, Left, Down, Right, Up, Left, Down, Left, Down, Square, Triangle.
All bike upgrades
At the main menu, press Up, Left, Down, Right, Up, Down(2), Left, Down, Square.
All bikes and riders
At the main menu, press Up, Left, Down, Right, Up, Left, Down, Up, Square.
All levels
At the main menu, press Up, Left, Down, Right, Up, Left, Down, Left, Left, Square.
All weapons and armor
At the main menu, press Up, Left, Down, Right, Up, Left, Down, Left, Down, Square.
Cheat mode
Enter TOOLAZY as a code.
Freestyle and other bonuses
At the Main Menu press Up, Left, Down, Right, Up, Left, Down, Left(2), Square. Then, go to championship and press Triangle to go back.