Dark Rockman.EXE

Dark Rockman.EXE is a delinquent NetNavi created from a part of Rockman's data, effectively becoming his "evil half." Jealous of Rockman and Netto's friendship, he attacks their friends and attempts to impersonate Rockman, though the disguise is quickly seen through.

[Spoiler] Later in the series, Dr. Regal sends Dark Rockman to enter Duo's Comet. Yet before doing so, Dark Rockman is defeated by Rockman in combat. He succeeds in escaping and accessing Duo's Comet, but Slur intervenes, running her sword though his back, deleting him. [/Spoiler]