Moving on to our next major threat is Tyranitar. Now that Steels have lost their Dark resistance, this gives Tyranitar the ability to Pursuit many Steels with impunity, with Choice Band Tyranitar being able to OHKO Jirachi with Pursuit if it attempts to switch, and still do enormous damage even if it doesn't (yes, I know Jirachi is getting the brunt of the abuse here, but bear me out lol). Several other Steels will also have some worries about Pursuit/Crunch, including our friend Honedge who used to have the great typing of Ghost/Steel, the typing not being so great anymore. I also see Ghost and Dark coverage becoming a little more common to 1) hit Steels and 2) hit Ghosts which will be a bit more threatening this upcoming generation.
To move on to the Pokemon that took the hardest hits from this announcement, we'll start with the Psychic/Steels. Jirachi, Metagross, and Bronzong now all have two more additional weaknesses, both being easily exploitable and extremely damaging. Jirachi is going to take the hardest blow, as it was an extremely commonly seen Pokemon in OU this generation, whereas next generation it will struggle a little. It does have the advantage of being able to hit Fairy types hard, but I'm not sure this will negate the enormous weaknesses it now has. Metagross, who has been in danger of falling from OU for months, will likely be finally pushed over the edge into either BL or UU, depending on what sort of Pokemon also end up in these tiers. Bronzong will also take quite the blow, not being the great defensive Pokemon with very few weaknesses anymore, and instead having very common ones.
I kinda agree with you that the Steel/Psychics have been utterly obliterated, and kinda disagree. Although it is true that, yes, they are now going to be ghost weak. But are they going to be Pursuit trapped and killed? Not by Tyranitar or Scizor at least (well, Bronzong will, but I won't consider it from now in because it doesn't really matter). Jirachi easily out speeds all TTar but ScarfTar, and it can Iron Head it to oblivion - and ScarfTar only does 70% with SE Crunch so even it can't really 'revenge' against Jirachi. Rachi can also easily invest in defence to deal with Scizor, or it could run Fire Punch. Metagross can use its Meteors to smash the Tyrannosaurus Rex, or it can Bullet Punch it. Meta gross can find trouble with Scizor, but I would imagine it will find a way to bypass Scizor.
So, if the next generation holds good Pursuit trappers, then Metagross and Jirachi are screwed. If not they'll be fine. So you really could be right or wrong at this point (at least, in my eyes).
Metagross will fall to UU anyway because of the power creep, not because of the dark weakness (although the ghost weakness sucks).
i know it's a big difference and it probably won't happen, but it isn't impossible because smogon is really dumb sometimes
Yah not that dumb. I mean seriously, have you seen the suspect test threads? Smogonites will come up with the idea of just banning the stone within seconds. After all, it came up within 2/3 posts of non-serious discussion here.
To be precise, of the currently existent Pokemon, Tyranitar, Bisharp, Krookodile, Skuntank, and Drapion all resist Gengar's STABs. I have no doubt that Tyranitar will still be popular in 6th Gen, and Bisharp might rise due to its newfound STAB coverage. Drapion and Skuntank have the advantage of not being weak to Focus Blast, so they might be rise a little if given some new toys, but I don't have as much hope for those two. Either way, Gengar should still have a few solid defensive checks, but it'll still be a crazy good offensive Pokemon.
I think that Tyranitar will become a lot more offensive in XY, as Dark offence will be buffed and Dark defender nerfed. I think that this means the mixed and SR sets will lose viability, while Cruch spam CB and Gengar counter Scarf will become a lot more popular. This change in attitude towards TTar could potentially mean that Sand looses a lot of creativity, or creativity could blossom, idk. But due to the downward spiral of the meta game these past couple gens, I think the former is more likely.
I also agree with you about Bisharp moving up to OU, but I think it would be because of its ability to counter Gengar, rather than because it has abusable moves.
Finally, you know I said about a Grass/Dark Chespin Evolution (as rumoured) that was a defensive behemoth? Well, between them they would resist ever single type except Fight and Rock, which can easily be dealt with. The potential there is delicious. Hopefully, Gamefreak can offset the power creep by adding interesting type combos with GOOD STATS, although that would be out of character for Gamefreak.
Though he is still cool.