It seems for whatever reason Donphan is always left unused by GF. And when i mean unused i mean that you never see this Pokemon used by any NPC in the game.

I might be wrong but i dont think anyone uses Donphan in the main games at all. Maybe some post game or battle facilities NPCs but in the main portion of the game i dont think i ever saw Donphan outside of wild encounter

I think the same applies to some other mons like Stantler and Shedinja. Why is that the case?