From Bulbapedia, the community-driven Pokémon encyclopedia.
Yellow Rock Isle (Japanese: 黄岩島 Ōgan Isle) is an island in the Whirl Islands archipelago, located between Red Rock Isle and Blue Point Isle.
Yellow Rock Isle traditions are largely based on Corsola. Residents of Yellow Rock Isle build their homes on Corsola nests near the shore, and each Corsola is considered part of the family unit. Additionally, artisans make jewelery out of Corsola horns here.
It also relies on many kinds of Pokémon to fuel its fishing and farming industries.
The island got its name from the yellow rocks that make up the island's geography, and even the city streets are yellow. Thus, the islanders are particularly fond of yellow Pokémon.
Cities and towns