Well I figure I bring it up for, you know, Morty...and Sabrina...and certain Trainer classes. And I think between ghost POKEMON and actual ghosts, there's a difference. Like I think I remember in Lavender town Tower WAAAAAAAAAY back in the 8-bit days when I last played a pokemon prior to HGSS, there was a specific ghost that was the ghost OF a pokemon, but not a ghost type, that you could see but not identify until you picked up the machine for it (it was a dead Marowak or something I think).