Advance GTA 2 (Gameboy Advance)

All cars:
Go to the screen with "Start" and a picture of the car. Hold B + L, then press Left until a chime is heard.

All tracks:
Go to the screen with "Start" and a picture of the car. Hold B + L, then press Right until a chime is heard.

All tune ups:
Go to the screen with "Start" and a picture of the car. Hold B + L, then press Up until a chime is heard.

Extra modes:
Go to the screen with "Start" and a picture of the car. Hold B + L, then press Down until a chime is heard. All three extra modes will not be unlocked.

View credits:
Go to the screen with "Start" and a picture of the car. Hold B + L, then press Up + B to view the ending credits.