https://www.gamespot.com/articles/pokemon-ultra-sun-and-moon-give-mimikyu-an-appropr/1100-6454847/

Despite its adorable appearance, Mimikyu is one of the more unsettling Pokemon introduced in Sun and Moon, and the upcoming Ultra Sun and Ultra Moon versions make the Ghost/Fairy-type even creepier by giving it a brand-new Z-Move.

The attack is called Let's Snuggle Forever, and it's a lot more insidious than its name may make it sound. When Mimikyu is equipped with its exclusive Z-Crystal, Mimikium Z, the Pokemon's Play Rough attack turns into Let's Snuggle Forever, a devastating Fairy-type move. You can watch Mimikyu use it on an unsuspecting Tyranitar in the trailer below.