Cheat mode: Press L + R, C-Left, C-Right,
L + R at the "Press Start" screen. Press
Start, then hold Z and repeatedly tap L at
the mode selection screen until the phrase "Cheat Mode"
is displayed. Hidden cars and other game modes will now be accessible.
Quick restart: Press Analog-stick Left + A + B
+ C-Down + C-Left after crashing to immediately
reposition in the center of the track.