Question: are there zygarde cells in ultra sun?
Answer: In Ultra Sun & Moon, instead of just getting a Zygarde like the base game, you can actually catch a Zygarde. You'll need to catch the 50% Forme to get the 100% Forme — there are no Zygarde Cell collectibles like last time. Go to Resolution Cave, Poni Island and reach the bottom. He's waiting for you at the bottom.