meaning "god within", is a large region that is the setting of the games Pokémon Diamond, Pearl, and Platinum, located far north of the Kanto/Johto landmass. The region contains a large amount of towns and cities, but only a few sea routes. It is a varied region containing a mountain range and four lakes, one of which is hidden, each housing a Legendary Pokémon. It is the first Pokémon role-playing video game to feature snowy regions. The region blends urban cities with more traditional towns together. It also has a hidden underground area that is used for housing secret bases, playing Capture the Flag games, and a fossil/item hunt. Seasons 10-13 of the Pokémon anime are the first seasons that are set in this region. Sinnoh is based on the geography of the Japanese island of Hokkaidō, the southern half of the Russian island of Sakhalin, and the disputedisland of Kunashir. A mountain range splits the Eastern and Western sides of Sinnoh, and the types of Pokémon there can differ in color and size, affecting the Shellos and Gastrodon species. The latest game set in Sinnoh was Pokémon Platinum. In Platinum, Sinnoh has gone through several changes, including the presence of snow in areas such as Twinleaf Town, the link to the Distortion World, and the Battle Frontier in the Battle Area.
