>>38300755> Fairy/DarkDefinitely would probably be some sort of imp or "totally not a demon, no we promise" otherwise it could be one of the various Japanese spirits that doesn't have a strong elemental theming. I think in general though such a Pokemon would be like a trickster, nothing outright evil but would play tricks, could probably work as a counterpart to Banette in a sense.
> Dark/ElectricObvious choice would be something in the vein of Luxray although I can certainly see a thundercloud Pokemon fitting this type as well, especially if it had an ability like Aerilate to give it Flying-Type moves in spite of a lack of STAB. Otherwise I could see such a Pokemon being some sort of broken machine, like maybe something based on Lightbulbs.
>Bug/DarkA parasite is probably the way they'll go with this type combination, someone pointed out a Tarantula which while certainly possible I think they'd more likely go with a non-venomous Spider as to avoid the Poison-Typing in its entirety. Otherwise I could imagine something like a Bedbug or a Weevil working with this typing.