A brand-new set of Field Research tasks is now available in Pokémon GO, focusing on Pokémon originally discovered in the Kanto region. As you complete these tasks, you may be able to encounter Pokémon such as Pikachu, Ditto and Eevee. And, if you collect enough stamps to earn a Research Breakthrough, you’ll have an opportunity to catch an immense Snorlax that knows Body Slam, a unique move that Snorlax currently found in the wild can’t learn.
Source: @PokemonGoApp
Pokémon Blog 
One thought on “New Pokémon GO Field Research tasks allow you to encounter Pikachu, Ditto, Eevee and special Snorlax that knows Body Slam”