Narwail

is a Boss Yo-kai and the main antagonist of the third movie.

In Yo-kai Watch: Wibble Wobble, he is a Rank S Yo-kai of the Slippery tribe.

Abilities and Powers
He has the ability to transport himself and other beings between the real and cartoon worlds by roaring.

Trivia
In spite of it being a Slippery tribe boss Yo-Kai, in the third movie, Hovernyan referrers to it as a heart of darkness born from inside humans inspirited by the will of kaima. It is not currently known what Hovernyan is referring to but he does have a history with that Yo-Kai tribe.