Which Mega Man game introduced the robotic dog Rush?

Mega Man 3 introduced Rush, Mega Man’s robotic dog companion. Created by Dr. Light, Rush could transform into useful support equipment, including a spring platform, a jet, and a submarine, giving Mega Man new ways to navigate stages and reach hidden areas.

Rush was more than a cosmetic sidekick. His transformations expanded the series’ level design and became a recurring part of Mega Man’s equipment in later games. Rush Coil, which launches Mega Man upward, is especially associated with the character and is often the first ability players think of.

A common mix-up is confusing Rush’s debut with Mega Man 2, which introduced other major series elements but did not feature the dog. Mega Man 4 also included Rush, but by then he was already established. Mega Man 3 was released for the Nintendo Entertainment System in 1990 in Japan and in 1990–1991 internationally.