El Cajon Track:
On the track selection screen, hold Up on the Control Pad and press the
L+R buttons simultaneously. You'll hear an air wrench sound. Now
highlight the El Paso track, hold Z, and press the A button.
Flagstaff Track:
On the track selection screen, hold Left on the Control Pad and press
the L button. You'll hear an air wrench sound. Now highlight the
Mojave track, hold Z, and press the A button.
Guadalupe Track:
On the track selection screen, hold Down on the Control Pad and press
the R button. You'll hear an air wrench sound. Now highlight the Vegas
track, hold Z and press the A button.
Monster Trucks:
On the truck selection screen, press one of the following C button
combinations to get the alternate Monster Truck.