Mega Man V
Mega Man V continues the handheld Mega Man tradition of favoring roman numerals over arabic numbers. It does manage to discontinue the handheld Mega Man tradition of lazily reusing Robot Masters. Instead there are Stardroids themed after planets. This game hails from the halcyon days of yore, so yes, there is a Pluto. Mega Man V also introduces a helpful cat named Tango, similar to Rush. Capcom soon realized that in fact cats are very lazy and thus a robotic cat helper doesn't make much sense, so Tango was banished and never seen again, besides that one time he appeared in a WonderSwan game nobody played.