Oh, over-powered! Sorry. They were only weak to bug and they took no damage at all from ghosts, remember? There is a much better power balance here.

Yeah they are not the most common type either. I mean there's more of them then there are ghosts but just...for whatever reason they tend to sort of...not really stand out? Or maybe that's just me. I only have one, myself, but before I got her I tended to forget about them too.