Yeah, I'll be hunting for high-level/good state Swinubs and shinies, but the best ones will obviously become Ice attackers so they don't need to be evolved in the window. I'll prob evolve a mediocre shiny with Ancient Power just for the legacy/novelty, at least, maybe a couple others. Fortunately I have plenty of Sinnoh stones saved up by now, not to mention the five guaranteed we can get that day.