The generation of ghosts and fairies xD
Theres not that many of either. You have Marshadow, Dhelmise, Alolan Marowak, the Cutiefly line, Magearna, Mimikyu and Lunala.
Tapus, Primarina, Morelull, Shiinotic, Comfey, Dandygast, Palossand, Ghost Oricorio(?) are enough
Oh. I forgot about those