At the main menu, select Dream Mode, and at the Brand Name screen, enter DREAMY to unlock all concept cars. If you entered the code correctly, the cars will appear when you start a game in Arcade Mode.

------------------------

At the main menu, select Dream Mode, and at the Brand name screen, enter the following codes to unlock the corresponding cheats. If entered correctly, all unlockables will appear when you start a game in Arcade Mode.

Unlock All Circuits: WORLD

Unlock Every Production Car: REALITY