In-game description A peculiar stone that can make certain species of Pokémon evolve. It burns as red as the evening sun.
Up-Grade
Details Evolution Item that is required to evolve Porygon into Porygon2.
In-game description A transparent device that can make certain species of Pokémon evolve. It was produced by Silph Co.
Sinnoh Stone
Details Evolution Item that is required to evolve many cross-generational Pokémon.
In-game description A special stone originally found in the Sinnoh region that can make certain species of Pokémon evolve. It is very tough and has a beautiful sheen.
There is small chance that they can be obtained from spinning Photo Disc in PokéStops and Gyms and trainer is guaranteed one on their seventh day spin streak. They can be also obtained as a reward from research tasks and gifts.
All Pokémon, that to evolve into them there is evolution item required, cannot be neither caught in the wild, hatched from an egg nor be a Raid Boss in the gym and the only way to acquire them is the evolution.
Historically, in the Pokémon game core-series, the following conditions described below will take place when one of these items are given to a Pokémon to hold:
Pokémon capable of holding either a Dragon Scale, King's Rock or Metal Coat will evolve when traded.
Pokémon capable of holding either a Sun Stone or Up-Grade will evolve when leveled-up.
On the official support page for Pokémon GO, Deepsea Scale and Deepsea Tooth were mentioned.
In the main series games, these items are required to evolve Clamperl into either Huntail or Gorebyss respectively. [1]
The Sinnoh Stone was first discovered in network traffic on November 6th, 2018.[2]
Graphic design of Sinnoh Stone hints that it is made of diamond and pearl materials which is reference to Pokémon: Diamond and Pearl games in which Sinnoh region was introduced.
During Hatchathon, claiming Research Breakthrough guaranteed a Sinnoh Stone.
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