We went on for a bit about Ho-Oh and what counters will be good for him when he has the charge move from hell; Solar Beam (SoB).
After running some sims I found some interesting results.
First off, so few mons that can resist SoB actually produce damage.
Realize the problem that we are dealing with here. This thing is basically a Lugia stat wise with an attack stat considerably stronger than Dragonite. If like me you are often in trouble with 10 raiders for Lugia think about the base need for 15 or so with good counters. That's crazy.
Here's the catch though. The only thing I found that survives SoB and does good damage is Dragonite (And of course the yet to be released Zapdos).Many of the things that resist or take no extra damage like Gyarados die at SoB. So does Golem. So using a Gyarados is doing less damage but also dying. This goes for a lot of mons. Even Tyranitar kind of pitifully pecks away with bite before MAYBE getting off an SE by the skin of his teeth but probably not in reality to be honest. Tyranitar (I know this is hard to believe) does better against SW since the damage he takes allows him to get off SE a little earlier and thus more comfortably.
I ran sims with level 38 attackers and no dodging.
Fwiw on Dragonite, he didn't just make it through SoB, he went on to drop multiple extra Outrages. And since it was set to "no dodging" this means the dodge bug not automatically take you like the others so if he dodges SoB (not very hard to do) he might continue even further than my sim.
For some reason I did not see him listed as a counter for Ho-Oh at all though.
Zapdos is the only other mon I hit that goes through SoB and outputs huge damage. Of course we all knew he would be a monster in this scenario.
I welcome any conversations or other sims run. I myself was surprised at these results.