Fun Fact: The character Beat actually originated from the development of Mega Man 3.
Mega Man 5 put Mega Man's brother Proto Man into the limelight by giving him a lead role in the story, and also introduced a character named “Beat” who players could call upon as an ally during combat if they found eight circuit boards hidden throughout the levels.
Once again Mega Man was put up against a group of eight Robot Masters, who were based on designs submitted to Capcom by fans of the franchise. Unique level designs included reversals of gravity and piloting water craft. There were also a few weapon tweaks. Fans continued to enjoy the Mega Man games, but critics had begun to tire of the repetitive designs and lack of risk-taking.