From Bulbapedia, the community-driven Pokémon encyclopedia.
Maisie Island (Japanese: レフレ島 Refle Island) is an anime-only location in Hoenn. It is located between Lilycove City and Mossdeep City.
It made its appearance in Clamperl of Wisdom, when Ash and his friends met up with Spoink again.
Pokémon seen on Maisie Island