Robopon 64: Robot Ponkotto 64 Codes -

Versus mode:
Complete at least 50% of the game in single player mode, then save the game. A 1P vs. 2P option will now be unlocked at the main menu.

Move faster:
Hold Z while walking or driving.

Display map:
Press C-Down when driving.

Alternate view:
Press C-Up when driving.