The official Pokémon Go Facebook page has announced that there would be special Sinnoh stone bonuses all day, in every region, on the day of the upcoming Swinub community day.
On the Swinub community day, you will be able to earn five Sinnoh stones from challenging team leaders and five additional stones if you challenge other trainers. No specifics regarding winning or losing are mentioned, so you may be able to get a stone from either result.
This is certainly a relief for many players–not only are the stones extremely difficult to obtain with consistency, Swinub needs the Sinnoh stone item to evolve into the third stage of its evolutionary line, Mamoswine. Considering Mamoswine will learn the exclusive move ancient power when evolved during the community day, and there’s the possibility of obtaining shinies, this is extremely helpful for the avid players and collectors out there. Of course, even those who aren’t interested in Swinub and its evolutions will benefit from Sinnoh stone-hoarding.
The Swinub community day will take place this weekend, on Saturday, February 16, running from 10 AM to 1 PM GMT, 11 AM to 2 PM PST, and 2 PM to 5 PM EST.