It also got 1st place at France Regionals (or nats, but I think Regs). And I said top 16, which TCL does not post despite people having records of 5-2/6-2, which is very solid for states. I can only personally account for my own states, but other ones as well I had heard that Wailord was being played much more than usual. The thing about wailord is that in general it isn't a bad deck if no one is testing the newest variant of it. For example, it did well for 1/2 days at cities and then went away because it was then tested against after results came back in publicly. This was also the case at Nats where it came out of nowhere and then many Worlds decks ran Bunnelby to tech against Wailord. I think my wording of 'viable deck' was a little vague. I mean that it is a deck that deserves a tier, but can't be expected to be seen frequently week to week. It involves metagaming and knowing what won in prior weeks/tournaments.
Also IMHO Wailord is one of the most braindead decks to run in this format. As long as you know how much damage your opponent can do in a turn and what the cards in your hand do (AZ/Cassius/Max Potion/etc.) then it's easy to run. You don't have to worry about stadium wars, damage output, having enough energy, and all of the other problems a regular deck faces. All you have to do is pass.