>>52717301>>52717312Could be that a a currently-living Ghost-type Pokemon can easily "change phase" to ignore EITHER side, one at a time, while a spirit-of-the-dead Ghost has little to no such control and will usually be "stuck" intangible to normal matter.
"Ghost" is intrinsically a "liminal" thing, about awkward edge-cases riding the boundary of life and death. Some Ghost-type Pokemon are simply spiritually powerful, some are the result of spirits sinking into various objects, and some are partially-dead Pokemon.
