Yep, I'm in the same boat as the ones who cannot trigger it after giving the item from pkhex. I've completed the main Paldea storyline (didn't complete any class), completed Kitakami story line and have caught the 3 legendaries also. And finally completed the Indigo Disk story and seen the crystal pool cutscene. Also all my 3 pokedexes are complete (except Pecharunt obviously). Every time I interact with the stall it just says something about dusty decorations arranged or something on those lines. If anyone finds anything on this plz help, please and thanks.
