Need for Speed Underground Cheats - GBA

Completion bonus
Successfully complete Go Underground mode to unlock all cars and upgrades.

Recommended cars
The first car that you should buy is the Subaru Impreza. The second best car to race would be the Toyota Celica. With the Celica, you should be able to be number one in drift, circuit, and drag racing.

Fast getaway
When racing in Underground mode or against a friend, never use the emergency brake ([L]). Using it will almost make you come to a complete stop, allowing your opponent to pass you. The best way is to just let off the gas for a few seconds before your next turn.

Glitch: Morph cars
Select "Quick Race" from the menu. Then, choose any car (for example, the Nissan Skyline). Press [A], and "Select Car?" will appear. Choose "Yes", and as soon as you select it, hold [Left] pad until you can see the Mazda Rx-7. The screen should fade away, and the car you are left with is a car that drives like an Rx-7 but resembles a Skyline. You can notice this better if you make the Mazda Red with all upgrades, and the Skyline White with no upgrades. You can do this with any two cars on the game, but if the cars are more than four spaces apart, the screen will fade away before you can get to it. For example, you cannot morph a Celica with a Skyline.