Aero Gauge.

N64 Controller Car

Finish the time attack mode with a time ending with .064 seconds.

All Vehicles/Tracks

Hold CNTRL II: [L]+[R]+Z as you turn on the system and keep them held down. Press CNTRL II: U+cD when PUSH START flashes on the screen, then press CNTRL I: START before the title screen vanishes.