>>16801390> Ghosts can manipulate objects easily (Rock, steel, water, grass, ice, ground) to communicate with the physical realm. In Japanese culture, all objects have souls, which is why you don't leave dolls in a dark room forever, they become evil spirits and must be purged with daylight. It also lends to their 'waste not, want not' cultural mentality.
> Ghosts manipulate energy (fire, electricity) with ease, like swaying candles or TV static or EVPs and shit. The case could be made here for wind manipulation for flying as well.As for poison/bug/dragon/fairy, these things don't interact much with ghosts in lore, but none of them were ever said to RESIST these things, so meh, neutral damage.
I think Flying and Bug types were allowed to be hit normally because birds and bugs are often harbingers of spiritual activity (flocks swarming haunted houses or killing themselves mysteriously, witch familiars) (bugs crawling over the skin or fleeing spiritual presences, etc)
Personally, because of how MANY birds supposedly wind up dead at hauntings, I kinda think ghost should be SE against flying, but it'd be too hard to remember or justify, probably.
Okay. Dark types fight dirty, they mess around with illicit things every day and play with evil, so yeah, they resist ghost types.
Fighting types are HEROES, remember, and in Japanese culture, superheroes are often bested by specters and spirits, relying on some cosmic help to help them dispel evil spirits.
However, the argument could easily be made that Normal and Hero attacks play by the general rules of non-elemental combat, which is why spirits remain immune.
Now, as for why Ghosts can hurt Heroes but not normal?
Simple: Ghosts can only hurt the things that are AWARE of them. That's why ghosts have to make contact with our world before they can attack humans, like Paranormal Activity or IT or insert-any-ghost-film-here.
Basically, Heroes are exceptionally quick-witted and intelligent, they notice shit.