Rush is a robotic dog and loyal companion to the protagonist, Mega Man, in the Rockman (also known as Mega Man) series. Designed by Dr. Light, Rush assists Mega Man with various support abilities, such as transforming into vehicles and providing transport or aid during missions. His adaptability and unwavering loyalty make him an essential ally in the fight against Dr. Wily and his robot army. Rush often adds a lighthearted, friendly dynamic to the team, enhancing both gameplay and story elements.