Now that Pokémon: Let’s Go, Pikachu! and Pokémon: Let’s Go, Eevee! have been released for Nintendo Switch, players are getting their first chance to learn more about the Mythical Pokémon Meltan. Professor Willow has even started asking for assistance with some new Special Research, so get out there and help track down information about this mysterious Steel-type Pokémon. In addition to finding Meltan via Special Research, there are other ways to use Pokémon GO to find rare Pokémon that can then be transferred into the new Nintendo Switch titles. Through November 27, 2018, new Field Research will be available that features Pokémon originally discovered in the Kanto region and not commonly found in Pokémon: Let’s Go, Pikachu! and Pokémon: Let’s Go, Eevee! Also, during that time, Pokémon such as Omanyte and Kabuto may appear in the wild more frequently.
Source: Pokemon.com and Nintendo of America @NintendoAmerica