>>38002391I get why dark is good against ghost, or at least I've applied my own personal logic to it that makes sense to me, obviously can't be sure this is what they were going for. If dark is evil type basically, it's about the closest we have to a demon type. You can see this influence in Houndoom although admittedly no others I can immediately think of. Demons torture ghosts in hell so, I guess that's the logic I apply to it.