Pokémon's GO Sinnoh Stone List has slowly changed over the year's ever since Niantic Labs introduced Generation IV. The game received a new stone to evolve all Pokémon from the Sinnoh region and beyond.
Here's a list of every Pokémon that needs the stone to evolve.
Pokémon GO Sinnoh Stone List: Updated List in Preparation of Sinnoh Event
The Sinnoh Stone is easily the most sought after item in the game. It's hard to farm and plenty of Pokémon need the item to evolve.
Use the new Sinnoh event to farm Sinnoh Stones. Plenty of the research tasks and challenge reward Sinnoh Stones, so now's the time to stockpile the evolution item. You'll be able to celebrate the event on Feb. 7 at 8:00 a.m. local time to Feb. 10 10:00 p.m. local time. Pokémon originally discovered in the Sinnoh region will be appearing more often in the wild and in raids.