Suggested by Sonic Harpnote may not be known as one of the strongest Megaman fighters out there but she can hold her own when the going gets tough. Darkside has various energy attacks up his sleeve but the guy isn’t very fast. Harpnote should be able to easily dodge all of his attacks and pelt him with the Harpnote blasts. Ultimately this will chip away at his health until he goes down. With no way to reliably counterattack, Darkside can onlyh delay the inevitable. Harpnote wins.