Narwail appeared in 2016 movie called Yo-kai Watch the Movie: The Great Adventure of the Flying Whale & the Double World, Nyan!. Narwail (Japanese: 大妖鬼ホゲホエール Daiyōki Hogehoēru) 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.
Narwail is a giant whale-like creature resembling a Japanese-style djinn. However before its true form was revealed it looks like the sign of whale with an envelope like shape on its fin.
His body is a dark shade of purplish-blue with dark magenta fins, chin, neck and stomach. He also has red emissive eyes and a darker magenta swirl pastern on his stomach. He wears a light blue ribbon around his back with dark ooze around the ends and rides a light purple cloud.
Narwail was created and controlled by Kanami Minami.
Narwail has an unknown connection to Koalanyan due to Koalanyan being able to control Narwail's special ability.
He has the ability to transport himself and other beings between the real and animated worlds by roaring.