Enma and the Lost Castle (Japanese: エンマと失われた城,Enma to Ushinawareta Shiro) is the 44th episode of the Yo-kai Watch Shadowside anime. It was broadcasted in Japan on February 22, 2019.
The Yo-kai Detective Team hears from Ananta, that if The Gloom was to obtain power, the human world and the Yo-kai World would be engulfed in great confusion, and the worlds would ultimately be destroyed. He also says that if Summer, who possesses the power of Juno, were to truly awaken, she might be able to defeat Overseer, which concerns Summer. Meanwhile in the Yo-kai World, Enma and Zazel reach the castle of Juno, the destination of their journey.