From Bulbapedia, the community-driven Pokémon encyclopedia.
Palm Hills (Japanese: アザラタウン Azara Town) is an anime-exclusive location in Johto, found in between New Bark Town and Cherrygrove City. It is a wealthy area of Johto and home to many famous people. It was featured in Snubbull Snobbery.
When Ash and his friends visited Palm Hills, Misty considered taking an official house-spotting tour for celebrities. They met with Madame Muchmoney after they stopped her Snubbull from escaping. They learned that Snubbull frequently ran away from its home, mostly because it was sick of being spoiled by Madame Muchmoney. Finally understanding how her Pokémon felt, she started to have a park area built for Snubbull to play in, but it found an excuse to leave when Team Rocket showed up. It enjoyed biting down on Meowth's tail, much to his chagrin.
Although Snubbull ran away, Madame Muchmoney tracked it down after it had evolved into Granbull, and convinced it to come back home with her in The Trouble With Snubbull.
Pokémon seen in Palm Hills