AERO GAUGE
All Tracks And Vehicles - You need two controllers for this code.
1. Turn on the game and press START on the contoller 1 until you see the screen that says "Push Start" (if you see "Grand Prix
Mode", you're too far.)
2. On controller 2, press up on the D-pad, C-down, R, L, and Z all at the same time. Then release them.
3. Immediately press start or the A-button on controller 1 to enter the Grand Prix mode.
All tracks and cars should be available now.
NOTE: If you can't get this trick to work, do step 2 a couple of times. (Press all the buttons a few times.)

Boost In Mid-Level
While you are drifting, hold Z+A at the same time then let go.

Change Vehicle Color
To change the color of your vehicle, tap R while highlighting the desired car.

Recovery In Bikini Beach
Near the end of the course you will see a waterfall. Look closely at the waterfall and you will see a red light. Fly into the waterfall and you will be in a recovery tube.
NOTE: Watch out at the end of the tube. When you come out you have to make a sharp right or else you will hit a wall.

Speed Up The Credits
While the credits are rolling at the end of a Grand Prix, press the start button to speed it up. To slow it down, press the start button again.

Turbo Boost
At the starting line, hold A and B. When the announcer says, "Go" release B but keep holding A. Good luck!