All-new Special Research called Celebrate 2019 is now available in Pokémon GO. Players can complete certain tasks to receive some special rewards in the form of a bunch of XP, 20 Ultra Balls, one guaranteed Unova Stone and nine Rare Candy. All you have to do is keep catching Pokémon, as you normally would! Check out the image above for more details.
New Special Research called Celebrate 2019 now available in Pokémon GO
Pokémon Blog 