Alola and Galar Pokemon Sprites do not pull correctly using dex drag-in feature (the base form image is used as the sprite). I tested with with a fresh install with no modules enabled.
Missing Z-Crystal Images
Aloraichium Z
Decidium Z
Eevium Z
Incinium Z
Kommonium Z
Steelium Z
Waterium Z
Other items missing images (I tried to only include items with Global Link images available on Bulbapedia)