Pokémon GO developer Niantic has revealed that the Alolan forms of Pokémon originally discovered in the Kanto region are coming soon to Pokémon GO. This includes the Alolan forms of Rattata, Raticate, Raichu, Sandshrew, Sandslash, Vulpix, Ninetales, Diglett, Dugtrio, Meowth, Persian, Geodude, Graveler, Golem, Grimer, Muk, Exeggutor and Marowak. The official announcement from the development team is as follows:
Sunny days are ahead! Whether your forecast calls for rain or shine, we’re celebrating all around the world by introducing some special Pokémon from the tropical Alola region to Pokémon GO. Get ready for some of the Pokémon originally discovered in the Kanto region to appear in their Alolan forms! These unique variants were first seen in the Pokémon Sun and Pokémon Moon video games, and they will make their way to Pokémon GO in the coming weeks. Keep an eye out for news related to this exciting change—and don’t forget to tell your friends! Stay safe, and happy exploring!
—The Pokémon GO team