Rockman & Forte: Mirai Kara no Chousensha (commonly translated as Mega Man & Bass: Challenger of the Future) is a sequel to Rockman & Forte (Mega Man & Bass), published by Bandai exclusively for the WonderSwan. A version of Rockman from the future - calling himself R-Shadow this time - travels back in time again with a group of robots to wreak havoc, until either Rockman or Forte put them all down.
In this movie, Noxxa beats the game with Forte (Bass) in record time.
We also have a movie that beats the game with Rockman (Mega Man).