These ideas remind me of some Digimon, but can't exactly put my finger on which at the moment, haha. They do sound pretty cool, though! There aren't much bug-ghost Pokémon out there aside from Shedinja, if I remember correctly, so if there are more, it definitely would be nice. Plus, with those aspects that you have mentioned, I feel that it'd be very popular as well (well, perhaps not among kids).