ネットワークの発達した近未来…… 裏電脳世界で邪悪な電脳生命体「ネビュラグレイ」が動き出す。 ある日、非物質化現象という「現実世界が消滅する」奇々怪々な事件が世界各地で発生。 これを食い止めるために父・光祐一朗に命じられ、 大手IT企業トリニティ・ブレイン社にあるヒカリタダシプログラムを破壊するためサイバーワールド最深部へと向かう熱斗とロックマン。 しかし破壊には失敗し非物質化現象は加速。熱斗の目の前で友人や多くの人々がその非物質化現象の犠牲となってしまう。 衝撃を受ける熱斗にさらなる事件が追い討ちをかけるように かつて熱斗とロックマンが倒したはずの悪の科学者・Dr.リーガルが突如現れ、祐一朗を何処かへと連れ去ってしまう。 愕然となる熱斗の前にネットセイバー仲間である炎山とライカの二人が協力を申し出、 南海の孤島にある20年前に閉鎖されたアメロッパの軍事基地でネビュラグレイとの最終決戦を繰り広げる。
In the year 20XX, a young boy named Netto Hikari receives a very special gift as he enters the 5th grade: his very own customized Net Navi, Rockman.
Mega Man is a robot created by a brilliant scientist named Dr. Light, who hoped many his many creations would only be used for good. One day however, a mad scientist named Dr. Wily stole Light's original 6 robots and creation plans. From them he began creating a whole new series of robots, with one goal... World Domination! But Dr. Light gave Mega Man the ultimate trump card when he built him. Mega Man possesses the ability to absorb the powers of other robots. Now Mega Man and his best friend, a robotic dog named Rush fight for everlasting peace against the evil Dr. Wily!
In the year 220X, a mourning 5th grader named Geo Stelar (Subaru Hoshikawa) is given an invention made by his late father called a visualizer, which allows him to see radio-wave-based aliens, which are trying to destroy the world. Together, with an alien named Omega-Xis (War-Rock), he fights to save the earth as Mega Man (Rockman).
Aki Light may seem like a regular, robot schoolboy, but when the villainous Sgt. Night and his team of Robot Masters emerge with ill-intentions, Aki transforms into Mega Man and dedicates himself to protecting Silicon City.
Japan is in grave danger! Megaman must prevent Dr. Wily from destroying Japan as we know it. But how? With a little knowledge of Japanese culture and geography, Megaman and his pals will try to stay one step ahead of the mad scientist. But will they be able to defeat Dr. Wily in time to save children's day? Or to avert the worst typhoon in history? Or to keep Mt. Fuji from erupting again?
