1.   safari  zone  in  brazil

The first-ever Pokémon GO Safari Zone in South America will take place later this month in Porto Alegre, Brazil. From January 25 to January 27, rare Pokémon and Relicanth will be spawning in Porto Alegre for those who win a ticket in the raffle.

During that weekend, Psyduck will spawn in increased numbers globally. It was not explicitly stated as with past Safari Zones, but it is implied that Shiny Psyduck will be released given the similarities to past real-world event tie-ins that released the Shiny Pokémon they boosted the spawn rates of.
SOURCE: Niantic

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2.   hoenn  migration

The latest Pokémon GO newsletter sent out by email this week ended with its typical mysterious hints. The newsletter mentions a migration of Hoenn Pokémon coming later in the month. At present, it is unclear to what the newsletter is referring to.
SOURCE: Pokémon GO Newsletter

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3.   HATCHATHON

Immediately following the 2018 Holiday Event, the Adventure Sync Hatchathon got underway. This event lasts until January 15 at 1:00 PM PST (the same date and time that Heatran leaves). Candy and Stardust rewards for hatching Pokémon are doubled, and the chance to get 5KM and 10KM Eggs is boosted.
SOURCE: Niantic, Community Reports

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4.   WHILE  WE  WERE  AWAY

Our annual holiday break is over, and it's time to get back to our normal release of articles. Stay tuned, Trainers! Meanwhile, here are the other miscellaneous headlines that happened since our last Weekend Download:
  - Deoxys (Attack Forme) came to EX Raids
  - Spinda #5 has been released
​  - Lugia, Ho-Oh added to Breakthroughs
​  - Shiny Sandshrew released globally
  - Shakeup of Raid Bosses
  - Holiday Event has ended
  - Totodile Day on Jan. 12
​  - Eggpool changed
SOURCE: Niantic, Community Reports