Rayquaza GX/Teal Mask Ogerpon ex

The main changes I'd make here are to remove a handful of the lightning energies you're currently running (2 or three works the best for me, as you're currently using enough recovery), and add the Lele-Dede-Bat core for more consistent drawing. Because I'm treating this as a turbo t1 swing deck, I'd remove the slower cards as well like Lady and maybe Volkner, and put in Vs Seekers to get more effective copies of the suppoerters you'll find yourself using more often. And this is subjective, but I belive that Energy Switch will yield better results than Max Elixir if you want a turn-one attack, as Ogerpon accelerates to itself. Think of thiis like a Raging Bolt deck, but less destructive.

Anyways, as far as the actual strategy goes, it looks fun, but I wouldn't suggest gettig your hopes up too high about this deck's viablility in Expanded because of its more linear gameplan and some clunkiness. Great concept!

CountyGibbon798 Thanks for the feedback! I actually got the inspiration for this deck from the standard format Raging-Ogerpon like you said, so energy switch is a great idea. I don't think I'll alter the energy too much because I want Tapu-Koko prism to be semi-consistent, but I get your point.

CountyGibbon798 I took your suggestions to heart and heavily altered the list. In the end I decided to scrap Vikavolt because it was really slow and I wanted something that could contest the meta with a good hand. I also realised Computer Search was somewhat unnecessary as I have Arven in the list. I thought Prime Catcher would be better as it provides more gusting potential. Oh, and the Fighting Fury Belt is to better the numbers game. It boosts Rayquaza to 220HP and turns a 270 swing into a 280 in case you fall short an energy.

Looking a lot better now, but don't underestimate the power of Computer Search! Just having it be searchable by Arven alone makes it so valuable, as it turns that supporter into a method of getting whatever you want, and the discard 2 condition synergizes with the Tapu Koko ability. I'd suggest putting it back.

And while this next point comes off as being immediately going back on what I just said about discarding, but the option of using Professor's Letter to sub on over Vessel is always an option, because outside of discarding two lightning energies, that's the only reason why you'll need to be using it really. Just being able to get the energies with no cost may help out in the long run. (Okay, I just did some research regarding expanded decks, and the more aggressive ones do like to use Prime Catcher over Computer Search.)

Like I said, this looks a lot better now!