Turbo Start
Hold A+B while your waiting at the start, then
release B after the announcer says 'READY!' to get a much needed
turbo start.
Turbo:
If you need extra speed in the race, hold down
A to accelerate, make a hard turn in either direction while
holding Z, then release both buttons. If by some miracle you've
got the timing right and haven't sent your car into the wall,
you'll get a burst of speed. You can keep using this until the
temp. gauge is too high.
Secret Cars
When the start screen appears, on controllers
2 push and hold up on the d-pad, then press R, L, Z and C down
simultaneously.