Penny Racers [N64]

Get Extra Points, Better Weapons and Advance in Class:
On class C, B and A win a medal in each to get better weapons, extra points and advance to class B, A and AA

Starting Boost:
At the beginning of a race, press and hold the A button right after the second light lights up, and you might not notice it, but the car has a little boost of speed.

Quick Parts Selection:
When the CPU is taking a part from you rapidly press A and this will speed up the process and make odds better that nothing is taken

Always trade parts:
Enter parts options screen and enable "Steal Parts" and "Trade/Swap Parts". The CPU will always trade instead of stealing your parts.

To get Bonus Mode AA:
Earn a medal on every track of mode A.