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.