All Cars, Tracks, and Difficulties:
At the mode select screen press L, Z, R, C-Up, C-Down, C-Left, C-Right, Start. You'll hear a sound to confirm.

Joker Cup:
To get the Joker Cup and six additional tracks beat the Jack, Queen, and King Cup on Standard difficulty.

X-Cup:
Win the Jack, Queen, King, and Joker Cups under the "Expert" difficulty level. The X-Cup is a group of six tracks that are randomly generated.

Master difficulty level:
Win the Jack, Queen, King, and Joker Cups under all three difficulty levels.

Rotate Cars on Customization Screen:
At the customization screen press the C-Buttons to rotate the car in all directions.

Smaller Cars:
At the ship select screen press and hold L+ R+ C-Up + C-Down+ C-Left + C-Right to shrink the cars.

Larger Cars:
At the ship select screen press and hold L+ R + Z + C-Up + C-Down+ C-Left + C-Right to enlage the cars.

Spinning Car:
Press Z + R during play to spin your ship. This can damage other ships.

Staff Ghost:
To get a staff ghost, beat these courses on Time Attack by these times:

Mute City         1:23:000
Silence           1:13:000
Sand Ocean        1:15:550
Devil's Forest    1:23:000
Big Blue          1:35:000
Port Town         1:36:000
Sector A          1:22:000
Red Canyon        1:19:000
Devil's Forest 2  1:24:200
Mute City 2       1:19:000
Big Blue 2        1:07:000
White Land        1:40:000
Fire Field        1:23:000
Silence 2         1:35:000
Sector B          1:45:000
Red Canyon 2      1:40:000
White Land 2      1:13:000
Mute City 3       1:46:000
Rainbow Road      2:11:000
Devil's Forest 3  1:20:000
Space Plant       2:04:000
Sand Ocean        1:35:000
Port Town 2       1:52:700
Big Hand          2:27:000 

Thanks to Revolution reader Rene Ellul, Terell Johnson, Mike, Phil Wijs, Joseph, Michael, Jag Da Cat, AL Snow and Head, and James McGuire!