From Bulbapedia, the community-driven Pokémon encyclopedia.
Volley Town (Japanese: バレータウン Valley Town) is an anime-exclusive location in Hoenn, found between Fortree City and Lilycove City. It was featured in Crazy as a Lunatone.
Volley Town appears to be based on a classic Western town, with dirt roads and wooden buildings. It is surrounded by steep cliffs on all sides and accessible only through narrow passes.
Ash, Brock, May, and Max were on their way to Lilycove City for May's next Contest and decided to take a rest at Volley Town, only to discover that the town was deserted. They located its Pokémon Center, though the town's Nurse Joy seemed a little odd.
Later, it was discovered that the townspeople, including Nurse Joy, were under the control of a Lunatone that had crash-landed nearby from outer space. Lunatone began to run out energy and lost its hold on the locals, which allowed Nurse Joy to heal it. She accompanied Ash and his friends to nearby Camerupt Point to help Lunatone return to its home.
Pokémon seen in Volley Town