It's quite obvious that every country we have, they have. It's also been noted how the regions are apart of one big nation.
But are Pokemon exclusive to, or only allowed, inside the nation? If not, what is the point of the Pokemon nation? Is it just their Japan? Does Japan exist in their world? Is Pokemon training, or Pokemon themselves, as widespread in other countries?
How different are the cultures, and social views, of the other countries/continents compared to the Pokemon regions? Are they like their counterparts in our world or do they follow the Pokemon nations one?