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It is possible that the Negaverse is a counterpart of sorts to the Posiverse. Compared to the dimension of Darkwing Duck, the Negaverse comes close to being a moral mirror dimension. Counting Negaduck, 80% of the population encountered on his one trip there is a morally reversed version of the people he knows, but the remaining 20% is not. Nega-Gosalyn is a good person just like Gosalyn and while Tank isn't nice, he's not evil and thus has the same alignment as his Nega-self. In general, Negaverse people have about two to three core traits different between them and their Wing-counterparts. For instance, Nega-Gosalyn is hyperfeminine and obedient, while Wing-Gosalyn is on the masculine side and does whatever she wants. Nega-Tank is polite, helpful, and intellectual, which Wing-Tank is everything but.
Physical differences by birth are also possible between mirror versions, though only minor ones. For instance, Nega-Honker does not have a need for glasses, unlike his Wing-self, and the opposite is true for Tank.
The portal to the Negaverse is a cake and there is an oblivion place. Fortunately, it is sealed by the Universal Plug.
- In "The Secret Origins of Darkwing Duck", Darkwing's and Negaduck's parents are almost identical in appearance but for Darkwing's mother having ireses. Both sets also die while their children are just babies. Given that small physical differences are possible and that other elements of the story told by the janitor have counterparts in the regular fiction, it is possible that Negaduck's parents are the Negaverse counterparts to Darkwing's parents.
- In the DiC dub of the anime Sailor Moon, the Negaverse is the home dimension of the Negaforce, Queen Beryl and their minions.