Any sort of Uxieruption, Shuppet, puppet show, etc. deck is no longer a smart choice to play. It wasn't even that stable of a choice during DP-SV format. The reason being was because if anything can possibly survive the first turn slaughter then the deck will have problems. It was also bad because if your opponent went second then they had a much better chance of surviving/winning (T1 Rare Candy, Call Energy+Roseanne's Research, etc.).
Now with the release of Platinum: Arceus these types of super speed decks are dead. They went from somewhere around tier 2/1.5 to tier 3. This is because Spiritomb WILL be a popular Pokemon. Whether it becomes someone's starter Pokemon or a tech to use. So Shuppet/Uxie decks will NOT become popular again (if they ever were).