Infinite money:
 800CD878 C6C0
 800CD87A 002D

Infinite Missiles (Note 1):
 800CD872 1E0A

Infinite Nitros (Note 1):
 800CD870 1E01

Infinite Clones:
 800CD876 0163

Note 1: These two codes are exclusive - only one of them can be used at any time.