December’s Field Research is bringing some of the year’s most popular Pokémon and research tasks back into the spotlight in Pokémon GO. Each time you complete a Research Breakthrough in December, you’ll encounter one of six different Legendary Pokémon—Articuno, Zapdos, Moltres, Raikou, Entei, or Suicune. You’ll also be able to take on some of the most popular Field Research tasks from past months by spinning Photo Discs at PokéStops. You’ll need to collect seven stamps by completing Field Research tasks to make a Research Breakthrough, and you can only earn one stamp each day. The sixth pattern of Spinda has also made its Pokémon GO debut. In addition, Shiny Misdreavus and Shiny Mismagius can now be found and caught for the very first time.