Pokémon World

Pokémon World is the name given to Mobius 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, Kalos, Orre, Fiore, Almia and Oblivia.

Theories
There have been numerous fan theories about the existence of Pokémon World, and its connection to Mobius. Although it is unlikely, it may be that humans have inhabited another planet somewhere else in the galaxy, in addition to Earth and Mobius. Another suggestion put forward by fans it that the story may take place in a parallel universe that also includes humans.

It is also assumed that it could be set some time in the future, due to the fact that people use enhanced technology such as Poké Balls, teleportation (in the PC's), and mechas (Team Rocket).

Animals have been mentioned many times such as in Pokémon Shipwreck, Ash saw fish when looking out the window. In one episode a Pidgey could be seen eating a worm. Also, when Ash caught his Caterpie, Misty mentioned that she hated bugs however she could be just referring to Bug-type Pokémon. But solid proof of common animals existing is the Pokédex entry for Gastly:

'''A being that exists as a thin gas. It can topple an Indian elephant by enveloping the prey in two seconds.'''

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 Vikings mostly live in Minnesota (a reference to the Minnesota Vikings sports team).