Stratos Car:
While at the main menu type XYZYX, then select a mode. Highlight the Celica on the car selection screen and press Down to select the AT transmission, and the Delta to select the MT transmission.

Easier Handling Car:
To select any car at the car selection screen hold X and press Enter.

Mirror Tracks:
While at the game select screen in arcade mode hold Y and press Enter.

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

All Tracks:
While in the options screen type XXY.

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

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