Easy Driving Car:
Hold X and press [Enter] to select any car at the car selection screen.
Mirrored Tracks
At the game select screen in arcade mode hold Y and press [Enter].

Get Stratos Car:
At the main menu type XYZYX and select a mode. Then, highlight the Celica on the car selection screen and press [Down] to select the AT transmission, and the Delta to select the MT transmission.

Get Ultimate Ghost Car:
Pick time attack mode. Hold X + Y and select "3 Laps".

Unlock All Tracks:
At the options screen type XXY .

Unlock Lake Side Track:
At the main menu press X + Y , then select any game.

Full Screen:
Hold X and press A at the car, race, or, mode selection screen to remove the dashboard and display.