Pokémon the Series: Sun & Moon Episode 26: So Long, Sophocles!
Episode 26 of 146 of Pokémon the Series: Sun & Moon, aired May 11, 2017, 25 minutes. Available with English subtitles and dub where released.
Episode summary
When Sophocles finds out that his family has to move, he keeps it to himself because he doesn’t want his friends to be sad—but eventually he has to tell them. Kiawe and Lana take Sophocles to their favorite places in Alola, Mallow plans a goodbye dinner, and Ash arrives with a special gift: a Charjabug for Sophocles to catch!