Someone is illegally giving out DarkChips, the powerful BattleChips that increase a NetNavi's strength but destroy its connection with its NetOp and turn the Navi into a Darkloid. Mr. Famous puts Lan and MegaMan on the trail of the mysterious chips. As the investigation unfolds, Lan and MegaMan have to battle NetNavi SpikeMan, and they also cross paths with a woman who looks just like Ms. Mari--and might be her evil twin sister!