There's definitely some tuning needed here. Over half my test games so far have been Shaymin starts, which I know has to just be bad luck more than anything because on paper there's a 1-in-3 chance of that, but I'm at more like 2-out-of-3. Really want a Ninja Boy in here just for that, but without something like Skyla to help get it when you need it I'm not sure what difference it will make. Still need to work that one out.
I dropped Sky Field which wasn't doing anything now that Bronzong is out in favor of Parallel City as the list in OP had. Since reports above say it has a somewhat even matchup with Mega Ray I'm hoping that will swing things a tad more favorably.
Also thinking I'll drop Hex Maniac for Pokemon Ranger now that Trevenant isn't going to be a thing in Standard. I think Ranger will be useful against more matchups than Hex will be.
I have a few reservations about switching out Wally for Rare Candy. With Wally you could potentially get Togekiss out on the first turn because of the evolution trait. The second concern is Devo Spray, if you use Candy for Togekiss you can't devolve and drop it back down right away losing the opportunity to reuse the ability, and doing that really gives this deck power to load Genesect up. Last issue coming to mind is Vileplume. I'm talking about dropping Hex so I don't feel like Vileplume is a massive threat, but if because of Vileplume I can't get Togekiss down then we're sitting ducks. Then even if you do keep Hex, and play it to get a turn of items, then you shut off Togekiss in the process. So without Wally in then Vileplume seems like an auto-loss between Togekiss being near impossible to play, and not being able to hit Carbink because of safeguard. Turns into a bad matchup really fast.
It might help against Carbink if you added the Cobalion from the OP.