Can we talk a bit about Mega Gyarados again? I see we've brought it up, and I've been using it on a stall team for a few reasons. Nevertheless, Mega Gyarados probably ranks in the top five of most devastating megas to face right now, for a majority of reason.
First off, Gyarados isn't a giveaway of a mega. Sure, the same goes for Tyranitar and to a lesser extent, Garchomp [but really, gar mega isn't even used outside of sand teams], but gyarados can abuse this fact. Secondly, of the megas in OU, Gyarados is one of three to have a type change upon mega evolving and pinsir can't really abuse this outside of avoiding like a conkedurr ice punch on a predicted swords dance.
Both of these lead to Mega Gyarados' most major key: His mega evolution turn. On this turn, Mega Gyarados changes what counters and checks him with ease. Fighting types, previously unable to come in, are now struggling to find a way back in. Rotom, previously the best check, is now getting destroyed by mold breaker earthquake. Landorus-i and Charizard-Y both need to get in, but couldn't reliably stick around due to the flying/water typing taking neutral damage at best. Aegislash and Bisharp no longer can do anything to Gyarados. Multiscale and Thick fat Dragonite/Venusaur (respectively) get destroyed where previously both could try and set up on Gyara.
But this alone, switching all the checks, wouldn't be enough. The addition of Dragon dance makes it so in that turn, all those checks that are supposed to take him in mega, bar Keldeo and maybe Zard-Y (if no rocks) are not getting the chance to check him. In fact, the best option is to force Mega Gyarados to kill your Pokemon so it can't get +1 speed right away. The literal worst case scenerio is your opponent loses a pokemon on your mega evolution. Your opponent CAN'T expect the mega evolution because the flying to dark type changes so many counters, there aren't many pokemon (any that I can think of) that can stay in and beat both.
Then add the bulk. While not as nasty as Ttar (Whose bulk is roughly comparable to registeel, and more so in sand), Mega-Gyarados has ferrothorn levels of bulk. He doesn't suffer from a 4x weakness to keldeo, either. This of course was what I wanted when I used him for stall. What's there to say about the bulk? He survives every form of priority, including Breloom's Tech LO Mach Punch. At +1, he also OHKOs loom... Coupled with that typing switch, it could be said that Gyarados gets dragon dances off easier than any other pokemon in the game. And it would be true.
So what does Gyarados do with these boosts? Well, Ice fang+Earthquake coupled with mold breaker is perfect coverage on the entire game. This isn't TYPE, this is EVERY POKEMON. Outside of Surskit. Water/Bug is the only type to have any resist to both when coupled with mold breaker. Waterfall simply adds a devastating stab for power whenever needed. 30 of 47 pokemon in OU are hit for SE damage. Of the remaining, 3 are fairies, 2 are chansey/blissey (who get murdered by DD anyways) and three are frail psychics who shouldn't hit back well anyways.
Seriously, this guy just isn't getting the light of day from people even though it might be the single most destructive pokemon in the metagame.
You're greatly overestimating Gyarados's offensive options. We're talking about non-STAB Earthquake and Ice Fang, a 65 BP move, which is only marginally better than a neutral STAB Waterfall against something 2x weak to Ice.
You also keep bringing up the "Gyarados's counters shift change when it mega evolves" argument, even though it's still walled by the likes of Skarmory and Ferrothorn (and actually, Ferrothorn has an easier time against M-Gyarados since it's now weak to Grass instead of neutral).
Mold Breaker Ice Fang dealing SE damage to M-Venusaur is cool, until you realize t has more than enough bulk to comfortable take them and M-Gyarados is now weak to grass.
Mega Gyarados is simply getting more attention now but even if it gets upgraded to S-rank it will eventually go back to A+ or even lower, just like Mega Venusaur, Pinsir and Charizard Y did before it.
In fact, I'd like to suggest to stop bringing up and dropping pokemon from the S-rank so often.
Only pokemon that can realistically hold the S-rank position in the long run, such as Aegislash, should be under that rank.











