AN: The following story is a supplementary collection of random stuff that pertains to the universe of Silver Fang, another fanfic I am writing. However, this isn't required to understand that story, nor is that story required to understand this.
Also, feel free to request any aspect of the Silver Fang universe you want to learn about via DM.
As a general overview, the planet has a lot of land mass on its western hemisphere. There is a land continent called the mainland, which contains various regions, including Kanto, Johto, Unova, and others. There are many large island that surround the main land, such as Sinnoh, which is a few miles off to the north of the mainland's coast. These regions all are deeply connected, culturally, economically, socially, etc.
This is in contrast to the two regions in the eastern hemisphere. The eastern hemisphere is almost completely ocean, with little land mass in comparison. One of the two regions is Alola, which is south of the other region, Hoenn. These two regions, as they are far from the rest of the world, are often underrepresented in global affairs and some even consider the easterners as inferior.
There is another region, known as the dark region. There is said to be many new and undiscovered pokemon on the region, but it is an island region, and the waters surrounding it seem to have a mind of their own. Whenever a human or pokemon tries approaching the island, the waters swallow him/her/it up, instantly killing/fainting. As nothing dangerous comes out of the island, everyone decided to simply ignore it.