To enable the cheat mode, for any game selected, at the game's menu move the cursor to the START option. Hold Up + B + Select, then press A. If done correctly, the starting jingle will be different from normal. You'll be able to manipulate game scores by the methods below for the associated game.

Code	Effect
Press A/B to increase scores to 1/10 points during the Flagman show time.	Flagman
Press B to set the lower score digits up to 99	Manhole
Press Up to set the lower score digits up to 99.	Ball
Press Up/Down to increase your scores to 100/10 points respectively.	Factory
Press Up/Down to increase your scores to 100/10 points respectively.	Vermin