Posiduck
From Multiversal Omnipedia
Posiduck was the embodied good half of Darkwing Duck, created by Megavolt's tron-splitter device. Posiduck was exceedingly kind and gentle, as well as lenient and (generally) pacifistic. He (kind of) helped Gosalyn Mallard and Launchpad McQuack find his dark side, Negaduck, and was later "galvanized" by a second blast from the tron-splitter into a being of pure positive energy. In this form, Posiduck was able to combat the identically "galvanized" Negaduck. As they battled, Megavolt reintegrated them into the "normal" Darkwing.