Kept Amoonguss at B (already explain why in the VR thread)
In my opinion Amoonguss probably deserves the B+ it got in the other thread. I don't really see how Amoonguss doesn't usually have room for Foul Play, considering HP Fire's only uses are 3HKOing Ferrothorn and maybe 2HKOing Mega Scizor (Amoonguss can't really touch Mawile even with HP Fire since Mawile outspeeds, has sub or Swords Dance, and 2/3HKOs with Sucker Punch/Iron Head/Play Rough). It's not like any of its other moves are any less replaceable than Foul Play, so you could just as easily use Hidden Power over Clear Smog/Stun Spore or maybe Giga Drain if you found yourself being forced out before you could use it (it being Giga Drain I mean). Sludge Bomb doesn't really hit too many other threats either, and with Sleep and possibly Paralyze, as well as a team literally full of Pokemon with Toxic, the Poison chance isn't very good either, and could cripple your team anyways because now you can't Toxic/Burn/Paralyze a Pokemon that switched into you. So while Amoonguss might not always have room for Foul Play, Foul Play is usually better than most of its other moves IMO.
Slowbro also doesn't wall as many Pokemon as well as you say it does either. Mega Charizard X can set up on it as long as Slowbro doesn't have Thunder Wave, and even if Slowbro does, paralyzation isn't as big of a deal as it would be since Charizard can boost its speed, and it has a good enough typing and is bulky enough that it's hard to wear down for most other defensive Pokemon. After one Dragon Dance, Dragon Claw 3HKOs, and after two it 2HKOs. So since it could go either way Slowbro isn't a reliable counter, and that's assuming Charizard doesn't have Thunder Punch or Outrage, and that it isn't a stall variant.
It wins against offensive LO Deoxys-S, so it mostly gets it, but special attacking variants or ones with Taunt aren't so easily beaten. If Azumarill is Choice Band and locked into another move then Slowbro beats it, but if it is BD or locks itself into Play Rough Slowbro gets beaten. If you're switching into Mega Gyarados it has likely already DDed or Dragon Dances on the switch, turning it into a similar scenario to Charizard X where luck is the most important factor, however Slowbro does even less back to Mega Gyarados than it does to Mega Charizard X. Fair enough about Talonflame, although it must be wary of boosting variants and Will-O-Wisp (if your cleric has died or cannot find time to switch in).
Mega Tyranitar gets the same scenario as the other Dragon Dancers, as Stone Edge 2HKOs after a single Dragon Dance which you are giving to it for free by switching. Dragonite also gets a free pass from Burn/Paralyze unlike the Mega Dragon Dancers and often Outrage which 2HKOs after a DD, although you beat it if Multiscale is already broken. You also have to be wary of boosting Landorus-T as Ice Beam doesn't OHKO while a x2 Earthquake gets you, although you do wall non-Swords Dance ones which are more common.
Hippowdon can phaze you out and then recover with Slack Off, and specially defensive ones are only 3HKOed by Scald. You can switch into Scarf Terrakion, but other variants you only check. Mandibuzz can't really touch you, but you can't exactly touch it either. Scald only 3HKOs Skarmory, giving it time to set up Spikes while Roosting, and if it's low on HP it can phaze you out.
So the list is this:
Slowbro: Mega Charizard X (shaky check), Deoxys-S (hard check), Choice Band Azumarill locked into anything but Play Rough, Excadrill, Garchomp, Dark Pulse-less Greninja, Mega Gyarados (shaky check), Keldeo, Mega Pinsir (shaky check), Choice Band Talonflame, DD Mega Tyranitar without Crunch (even without Crunch still a shaky check), regular Tyranitar without Crunch, Dragonite (shaky check), Heatran, non-Swords Dance Landorus-T, Choice Scarf Terrakion (fair check to the rest), Mamoswine.
10 Shaky Checks or things it only counters without a certain move
7 Things it Counters/Hard Checks
Amoonguss: Aegislash (shaky check), Thundurus (shaky check), Azumarill (I generally view it as more of a shaky check but whatever), non-Flamethrower Clefable, non-Ice Fang Mega Gyarados, Choice Scarf Keldeo locked into anything but HP Flying/Icy Wind, Mega Mawile (shaky check), Mega Tyranitar, regular Tyranitar, Hippowdon, Terrakion, Breloom.
7 Shaky Checks or things it only counters without a certain move
5 Things it Counters/Hard Checks (although there are definitely more, like Rotom-W or Aegislash which it checks but weren't put on the original list)
Pretty equal I'd say. And you didn't really counter many of the arguments that were used to raise it up (such as it being very useful as a pivot on balance and it doing some things just as good as Mega Venusaur who was in A at the time mainly for its use on defensive teams, etc.), just for the most part counter Gary's little paragraph.
Azumarill
Scizor (Mega)
Breloom
Chansey
