Enter during gameplay for the desired effect. Japanese version only.

Code	Effect
Hold B on Controller two	Speed Up Movement.
Press A+B+L+R on controller one	Soft Reset.
Press X on Controller two	Debug Display.
Press X+Y+L+R on Controller one	Free-Movement Mode (press B to disable)
Press Y on Controller two	Power Up Gun (Repeat up to three times to fully power it up)