Oh... this should help up. At least this should happen while we're not halfway in supposedly Rayquaza raid. If they spawn just as many as Pikachu back then, then I must use this moment to max up the Dragon medal and be done with it. Very great, this means if everything goes well, by the time Lati_s come I'm perfectly ready for them.
3x stardusts. This can only mean the best time ever to drop all (well, 6 at most) the star pieces, making it easily 4.5x. Not that I really need dusts, but... maybe I should really use those dusts I've gathered....
In the meantime, stock up your balls and especially berries. We will want to get hoards of candies for easy stuff even though Rayquaza during it somewhat invalidates Dragonite. (Then again, Rayquaza can't defend gym, but then again again, now I somewhat hate Dragonite; they're mooks of choice used by major high levels, some in my area of which I have vendetta with. The same reason I keep defending with Vaporeon.)