Pokémon World is the name given to the Earth-like planet that the Pokémon series takes place on. Humans live on this planet alongside Pokémon as a human-animal relationship.
Known regions on the planet include Kanto, Johto, Hoenn, Sinnoh, Unova, Orre, Fiore, Almia and Oblivia.
Relationship with Earth
Locations from Earth have been referenced despite not appearing in the games such as Mount Everest in one of Delibird's Pokédex entries and Hollywood from Meowth's backstory in the anime. Also in the movie: Mewtwo Strikes back, Ash said Viking mostly live in Minnesota.