Turn on the game and press Start on controller 1 until you see the screen that says "Push Start" (if you see "Grand Prix Mode", you're too far). On controller 2, press Up on the D-pad, C-Down, L, R, and Z all at the same time. Then release them. Immediately press Start or A on controller 1 to enter the Grand Prix mode. All tracks and cars should be available now.

In Grand Prix mode with the Expert difficulty get first place on each course, and you will have the China Town Jam Track.

In Grand Prix mode with the Intermediate difficulty get first place on each course, and you will have the Neo Speed Way Track.

In Time Attack mode get a race time that ends in .064 seconds.

Beat the game in first place in the Expert difficulty using the Black Lighting.

Beat the game in first place in the Expert difficulty using the Hornet.

Beat the game in first place in the Expert difficulty using the Shredder.

Beat the game in first place in the Expert difficulty using the Avenger.