Pokémon that were originally discovered in the Sinnoh region have recently begun showing up in Pokémon GO, and you can prepare yourself for the arrival of more during this special Hatchathon event. From November 14, 2018, at 1:00 p.m. PST to November 27, 2018, at 1:00 p.m. PST, some Pokémon with evolved forms originally discovered in the Sinnoh region—such as Rhyhorn, Porygon, and Magby—will be present in 2 km Eggs. There will be other Pokémon showing up in these 2 km Eggs as well, and if you’re especially lucky, you may even hatch a Shiny Elekid!
Source: Pokemon.com and @PokemonGoApp
Pokémon Blog 
9 thoughts on “Pokémon that evolve into Sinnoh Pokémon now hatch from 2 km Eggs in Pokémon GO until November 27”