Yo-kai Watch is a children's anime series based on the video game of the same name developed by Level-5.
Its first opening theme through episode 36 was "Geragerapō no Uta" (ゲラゲラポーのうた, "The Hahaha Song") performed by King Cream Soda (キング・クリームソーダ, Kingu Kurīmusōda), with lyrics written by m.o.v.e's vocalist motsu.
An English version of the song was used for the dub, written by Mark Risley & David H. Steinberg, and performed by Peter Michail & Kathryn Lynn, but was replaced by "Yo-Kai Watch featuring Swampy Marsh" by Jeff "Swampy" Marsh & Dan Povenmire.
Episode 37's opening theme was "Matsuribayashi de Geragerapō" (祭り囃子でゲラゲラポー, "Festival Music Laughter") and episode 38's was "Hatsukoitōge de Geragerapō" (初恋峠でゲラゲラポー, "First Love's Pass Laughter), both by King Cream Soda, and have alternated until they were replaced.
In episode 51, the ending theme changed to "Idol wa Ooh-Nya-Nya no Ken" (アイドルはウーニャニャの件, Aidoru wa Ūnyanya no Ken, "Idols Are a Matter of Ooh-Nya-Nya") performed by an AKB48 subgroup named NyaKB with Pandanoko.
The ending theme changed in episode 68 to "Yōkai Taisō Dai-Ni" (ようかい体操第二, "Yo-kai Exercise Number Two") by Dream5.
by King Cream Soda, and the ending became "HaloChri Dance" (ハロ・クリダンス Haro・Kuri Dansu) by Youbekkusu Rengō-gun.
In February 2018, it was announced that the anime would end on March 30, 2018, at 214 episodes and was replaced with Yo-kai Watch Shadowside to continue the storyline that began in Oni-ō no Fukkatsu.