Pokemon (2019) EP79 - Night and Day, You Are the Ones!

Satoshi, Go and Koharu visit the Eclipse Castle in the Johto region to take part in a festival. Once there, Satoshi and Go are told the backstory of the Eclipse Castle by Himari, the current lord of the castle. Meanwhile, Koharu encounters Haruhi after Koharu's Evol is rescued from falling down a cliff by Haruhi's Eifie. The two girls realize that they are doppelgänger's of each other. Reuniting with Satoshi and Go, Haruhi tells the trio the history of her Eifie and Blacky, and informs them that she will be named the new lord of the castle. While Koharu leaves to prepare for the festival, she is kidnapped by someone who mistakes her for Haruhi. The mysterious trainer returns to the Eclipse Castle, who reveals himself as Katsuki, and demands that he be named lord of the castle. However, Satoshi and Go arrive along with Koharu. A battle between Koharu and Haruhi against Katsuki ensues, resulting in Katsuki's defeat. Haruhi approaches Katsuki and explains to him the traditions of the castle. Haruhi's name shares a similarity with a previous lord of the castle, and Katsuki's name shares a similarity with the brother of the previous lord who tried to dethrone his older sibling. Haruhi realizes that Katsuki is a descendant of the brother from long ago. With this, Haruhi and Katsuki unite, and are appointed lords of the Eclipse Castle.