>>38310174I used an Alola-Muk on my Ultra Sun team, and it was really good.
Granted, I also bred Curse and Shadow Sneak onto mine, but it'd probably be good even without those. I guess a Ghost-type attack isn't necessary because Alola-Muk no longer has a Psychic weakness but, with Poison Touch, Shadow Sneak is SO GOOD for putting poison onto enemies quickly.