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Dr. Willy is the primary enemy in the Mega Man series. For a full list of enemies, however, go here. —Preceding unsigned comment added by Bentendo (talkcontribs)

Throughout the Mega Man series, Mega Man doesn't really have a set nemesis, however Bass is generally considered his nemesis.  Rocketslime_1_1  Talk  Wall  Contribs  23:04,10/9/2012