While its good that it seems Manaphy will remain A+, I don't understand why people keep calling it a wallbreaker, when it's played more like a bulky sweeper or a tank. When I think wallbreaker, I think Kyu-B, Gardevoir and Heracross. These guys can 1-2HKO the majority of the tier
without set-up. Any pokemon is threatening at +6, Manaphy can just get there faster than most. Now as for some of the other noms...
Weavile to A+? While Weavile is performing admirably, A+ is a pretty effing crowded bracket right now. I can't conceptualize exactly why I have trepidations in it moving up. It's just that the things in A+ are sooooo good, the face of OU, and I don't have that perception of Weavile yet. I guess I just need better convincing.
Mega Garchomp to B+? In all fairness, yeah, I think it's far more reliable in a wallbreaking role than either Medicham, Heracross, Diggersby, and indirectly to Gallade. Compared to Medicham directly, going from 102 to 92 in terms of speed is still better than going from 80 to 100 if you ask me. That's still one good turn to outspeed all base 100s the initial turn and act as a Tankchomp lure, allowing you to say use Stone Edge on that Char-Y sitting in front of you. In terms of boosting, Garchomp has SD, Medicham has PuP or Bulk Up, only a poor typing and mediocre defenses and speed to utilize it. Garchomp's defensive typing and bulk are astounding, and a Thunder Wave immunity doesn't hurt either. And despite being a wallbreaker, none are boned like Medicham thanks to Protect users. Can you believe it's actually a risk to net the otherwise easy OHKO on Heatran, or Ferrothorn, with HJK when so many carry Protect? Not to mention having a Sableye or Gengar makes you hesitant to even use your best wallbreaking move at all. This means it has to use support options like Fake Out and Substitute to net megavolving, get chip damage, and scout, leaving your coverage severely lacking, as dual STAB alone performs woefully. While it hits harder than anything, many other wallbreakers hit hard enough, and more consistently, that the end result is I almost always find Medicham lacking. Garchomp has better dual STAB options, and can attack specially to get past would be checks, or be bulky to outlast other would be checks, and finally can turn the opponent's sand against them, as Hippo and Tyranitar are quite common, making Garchomp all the better a wallbreaker.
So in short,at the very least,
Mega Garchomp for B+, and while we are at it
Mega Medicham for B. Mega Garchomp is far more consistent overall with much better stats, typing and movepool. While we are on the topic of wallbreakers, and if these two changes get implemented, I also nominate
Mega Heracross to B as well. In terms of wallbreaking it's still among the best in terms of raw power, and its amazing Skill Link attacks, and good boosting options. But my main argument is the state of the meta game is unfavorable to it. Fire, Fairy, and Flying (the three Fs), are all en vogue, as well as speed, and these are all poor trends for Heracross. Which is a shame, because it's bulk is fantastic at 80/115/105 with decent typing, but you'd need to go max/max for SpD to handle checks. This isn't a huge loss as its ludicrous 185 attack stat that makes even Kyurem-B blush sits at a pretty 446 with an Adamant nature and 0 EVs. To put in perspective, that's roughly 20 points higher still than 252+ Haxorus and 252 Mega Gallade, and those aren't offensive slouches. And you can boost on top of that. However, finding the opportunity to boost is difficult as it should be hitting switch ins, and it's also susceptible to all forms of status. If anything, its base iteration performs better in this meta.
0+ Atk Mega Heracross Pin Missile (5 hits) vs. 0 HP / 0- Def Mega Metagross: 210-245 (69.7 - 81.3%) -- guaranteed 2HKO
252 Atk Guts Heracross Megahorn vs. 0 HP / 0- Def Mega Metagross: 223-264 (74 - 87.7%) -- guaranteed 2HKO
Scarf Heracross performs admirably against offensive and defensive teams alike, whereas Mega Heracross really shines against defensive teams. Jolly Guts Megahorn hits harder than even Adamant 252 Pin Missle, and Heracross can actually hit first. Scarf sets outspeed even Timid Mega Alakazam, and even without Guts activated, here are all the relevant OHKOs it can get against sweepers.
252 Atk Heracross Megahorn vs. 0 HP / 0 Def Latios: 458-542 (153.1 - 181.2%) -- guaranteed OHKO
252 Atk Heracross Megahorn vs. 32 HP / 0 Def Mega Alakazam: 542-638 (209.2 - 246.3%) -- guaranteed OHKO
252 Atk Heracross Megahorn vs. 0 HP / 0 Def Mega Sceptile: 486-572 (172.9 - 203.5%) -- guaranteed OHKO
252 Atk Heracross Megahorn vs. 0 HP / 24 Def Weavile: 524-618 (186.4 - 219.9%) -- guaranteed OHKO
252 Atk Heracross Megahorn vs. 0 HP / 0 Def Serperior: 398-470 (136.7 - 161.5%) -- guaranteed OHKO
252 Atk Heracross Megahorn vs. 0 HP / 4 Def Mega Gyarados: 354-416 (106.9 - 125.6%) -- guaranteed OHKO (revenge +1 Mega Gyarados)
252 Atk Heracross Close Combat vs. 0 HP / 4 Def Mega Tyranitar: 540-636 (158.3 - 186.5%) -- guaranteed OHKO (revenge +1 Mega Tyranitar)
252 Atk Heracross Megahorn vs. 0 HP / 4 Def Mega Manectric: 229-270 (81.4 - 96%) -- 56.3% chance to OHKO after Stealth Rock
252 Atk Heracross Earthquake vs. 0 HP / 0 Def Mega Diancie: 196-232 (81.3 - 96.2%) -- 56.3% chance to OHKO after Stealth Rock
You get the point. So really, I think the gap between the Hera's needs to be narrowed for the current meta. So I nominate
Heracross for B- It's much better than the rest of C+ tier.
Mega Tyranitar for B+? No kidding, this thing was never bad, and its stats are just... ridiculous. But while it can set up easily, its still quite slow for a DD user, and being weak to Aqua Jet, Bullet Punch and Mach Punch is really bad news. Yeah, it has the bulk to survive most priority outside of Mach Punch, but when it comes to performing as a sweeper, it doesn't get nearly as much mileage as Charizard-X or Mega Gyarados. Granted, there's already a justifiable gap between them, but I've only seen meta trends be less favorable for Megatar, not better. If anything, I think an Adamant Rock Polish set with 180 HP / 252 At / 76 Spe would perform better. Adamant lets you hit a bit harder right out of the gate so you can attack without boosts if necessary, you get a sizeable increase in bulk with the HP investment, and with RP you now outspeed even Mega Alakazam. Tyranitar has the blessing of such a good offensive movepool you can take out anything you want between three moves, even lure things like Landorus-T with Ice Beam with the right EV adjustments (more speed and Nature that doesn't lower SpA). But I think its position is fine where it is, as I'm just speculating.
Keep Mega Tyranitar B
Mega Venusaur in A+? His role as a blanket check to the meta is a bit overstated. As I've said before, numerous trends are still holding it back, like Tornadus-T as a small one, Char-X as another (loses to bulky wisp and SD hard, needs EQ to stand any chance). There's also a plethora of Steel types with a field day setting up on it like Bisharp and Mega Scizor. It's dual STABs are niche for a reason, they compliment each other horribly. In practice, Mega Venu gets worn down fast and quick thanks to Spikes, SR, Sand, Scald burns, no Leftovers, and inconsistent healing from Giga Drain and Synthesis. Also its speed lets it down as it is prime poke prey for the plethora of popular wallbreakers or just offensive threats with SE STABS like Mega Gardevoir, (M) Alakazam, Talonflame, Kyurem-B, both Charizards, Thundurus, Mega Metagross, Mega Gallade, Mega Medicham, the Latis, Mega Aerodactyl, Mega Pinsir, Mega Garchomp, Jirachi, Dragalge, Mew, Reuniclus (etc.) I mean, is it common for something in A+ to be threatened by so much and still be considered a
blanket check? Now don't get me wrong, Mega Venusaur is a big-ass nuisance for a ton of popular threats, including two S rankers single handedly. But it isn't A+ worthy in my opinion.
Mega Venusaur stays A