Rush

Rush, called Rash in Japan, is Mega Man's robotic dog and an all-purpose support unit created by Dr. Light and Dr. Wily. He can transform into specialized forms including the Rush Marine submarine and the flying Rush Jet, while the Rush Coil helps Mega Man reach high platforms.

Other forms include a motorcycle, drill car, and spaceship, while the later Rush Adaptor can attach Rush to Mega Man to provide additional mobility and firepower.