Pause the game and press L1 + L2 + R1 + R2 to remove the G-force meter. Repeat this code to remove all the meters. Repeat this code once more to restore the display to normal.
Pause the game and press Right(3), Left(3) to remove all cars from the display. Repeat this code to restore the display to normal.
Complete the following goals in each level to unlock the corresponding bonuses:
Get into the top three at the beginning to unlock the Supottore-Su car (single player), Calsonic Primeraitc car (two player), R390GT1 car (time attack), and the Asia and Italy races.
Get into top three in scenario 2 at the end to unlock five new cars in single player, two player, and time attack modes, and the Pacific and Japan races.
Get first place in scenario 3 to unlock five new cars in single player, two player, and time attack modes.
Set the number of laps to 20 in scenario 4. Then finish in third at the end to unlock eight cars.
Set the number of laps to 20 in scenario 5. Then finish in first at the end to unlock the GTP-ZxTurbo car and all the cars in scenarios 1 through 5.
Set the number of laps to "Full". Then finish in first at the end to unlock an extra difficulty level.
