So, we’re a week into the new season and there appears to be no change in what gives extra stardust. I know people have said it’s a constant list which rotates across locations and the official announcements don’t say, but I saw this on a niantic twitter on 02nd December
“Trainers, some Pokémon, such as Shellder and Trubbish, are granting more Stardust than usual this season!”
Which suggests it was meant to rotate. Additionally GP and a few other sites have also started a “dust boosts this season” list.
Anyone got a more definitive source for which it’s meant to be?