a blue robot created by the scientist known as Dr. Light. Mega Man fights the evil robot masters sent by Dr. Wily. With each robot master defeated, Mega Man gains a new weapon. Each boss has a weakness towards a certain weapon. There are usually 8 robot masters per game (except MM1, where there was 6).
Mega Man has two siblings. Protoman, his darker sibling, is lonely, and mysterious, and sometimes is framed by Wily as an evil robot. His other sibling is Roll, but for some odd reason, the creators of Capcom decided to make Roll as Mega Man's love interest which is really disturbing since they are siblings...but who cares, robots can do anything.
Mega Man has 8 games in the original series, MM1-6 on the NES, MM7 on the SNES, and MM8 on the PS1. Recently, all 8 games plus 2 Mega Man arcade games were released in the Mega Man Anniversary Collection.
Mega Man also has an anime that aired long time ago.