I never says it completely destroys hyper offense. It's just a very reliable switch-in to most hyper offense threats barring bisharp and fire types.I don't doubt that this is as effective at taking on individual physical attackers as you say it is (the calcs I've done thus far support this), but with no recovery to speak of, it's not going to be destroying Hyper Offense / priority spam teams -- not even ones that are running four non-Fire physical attackers :3
If this set does become popular, I should note that Refrigerate Entei doesn't break a bird-eating sweat decimating it with Sacred Fire.
To address the first point, I sometimes run it with wish support from PH Vape, which takes care of the fire spam weakness and the longevity problem. Not to mention it provides decent momentum.
Also saying that Entei beats it really isn't a good argument; that's like saying Skarmory is a good physical wall in gen 5 OU, but it loses to Victini.
Mega Houndoom is okay, it nukes things like nothing else, especially since it gets nasty plot and a nice base speed, letting it break past even the likes of chansey. However, it's not as good as it could be due to only getting 1 time to set up and being easily forced out by priority (which is all over AAA). Also, it has the longevity of a dollar store product.What's the general viability of Megas with weather dependent abilities, with their pre mega forms with drought, Drizzle, and Sand stream?
I find Mega Houndoom not even need to invest in Sp Attack it hit quite hard and Sucker Punch and Pursuit are nice to have.
Mega Pert Sounds alright, A hard to switch in waterfall and the ability to be non flying fire type water absorbers is nice.
Mega Chomp and Mega Steelix have stupidly strong EQs.
But they do only get one to to set up it so they sound gimmicky to me.
Mega Swampert is actually pretty amazing; it's an excellent late game cleaner with insane power, and ice punch/waterfall/earthquake is all you really need to hit the majority of mons super effectively. I'd say it's the best of the four.
Mega Garchomp is honestly pretty underwhelming. By mega evolving, you lose 10 points on base speed, and those 10 points can be huge in a tier with crazy strong pokemon. Sand force is really just a life orb that boosts ground, rock, and steel moves; and most of the time, it can't break past stall nor offense due to stuff like skarmory or mamoswine. Still, this thing could work if you run a dedicated sand team.
Mega Steelix's typing is honestly cancer for it; being weak to fire, fighting, ground, and water in this meta is just god-awful, even with that bulk. Although, it can switch in on a bird, click gyro ball/eq (predicting), and watch something die. Still not worth a mega slot though imo; too slow, typing is too bad, and the power just doesn't cut it.