Alright, sorry I'm late in updating this, but lots of text incoming.
Changes:
Alakazam: A to A+, simply due to the fact that switching into it is so difficult especially with Spikes where it thrives. Definitely an extremely influential Pokemon in the tier.
Kyurem: A- to B+. As expected, there was quite a bit of discussion on this. The main argument regarding it is that it punishes teams that throw on a Florges as their Dragon check. This is true and it's the largest reason to use Kyurem at all over Hydreigon, but it still stands that Hydreigon is flat out the better choice the large majority of the time due to its better typing/resistances, lack of Stealth Rock weakness, and higher versatility. Also, though Kyurem does better against Whimsicott and Florges, it has additional checks as well in Pokemon such as Bronzong and Escavalier. Hydreigon can also viably run Focus Blast as its third moveslot on LO and Specs sets to hit the same generic special walls that Kyurem can, so it's not like Kyurem has an advantage there either. There's no doubt that Kyurem's a good Pokemon, but I don't think anyone can agree that it's on the same level in this tier as, for example, Infernape or Mega Sceptile.
Donphan: B- to C+. People mentioned offensive sets, but Krookodile and Mamoswine are about 100x better as offensive Ground-types. Like I mentioned in my previous post, you only use it when you're desperate for an offensive-ish spin, and that's exactly what the C ranks are for.
All of these were supported by most people:
Honchkrow: B- to C+
Diancie: C+ to B-.
Meloetta: C to C+
Flygon: Unranked to C-
Vaporeon: C- to D. Just because it has access to Wish + Baton Pass doesn't mean that's a worthwhile use of a Pokemon.
Other nominations from last time:
Venomoth: stays B, yeah idk what I was thinking lol this is so much more of a threat than B-.
Slurpuff: stays B. I thought about this for a while and while Slurpuff definitely isn't the greatest sweeper, it's probably fairly ranked in B for now.
YABO's post sums it up nicely.
Nominations:
Porygon2: B+ to B. I never really thought this was that good, but it does check a fair number of top threats and is one of the few actual counters to Gyarados so that's pretty good. I'd like to see some more discussion on this one.
Slowking: B+ to A-. Leaning towards no, yes it's very useful and checks a lot of things but definitely not at the level required for it to go to A-. Regardless, what are other people's opinions?
Darmanitan: B- to B. Been using Scarf Darm recently and it actually performs surprisingly well against many offensive teams since people don't really think to prepare for it. Overall Mienshao and Hydreigon are better Scarf users by far, and it will be pretty useless / even a liability some of the time, but with the right partners it can be more effective than its rank currently shows.
Other stuff that people brought up:
Aromatisse: The main thing that keeps this where it is right now is the fact that it's an actual full counter to Sableye with Aroma Veil, whereas Florges is prone to getting worn down via Knock Off, WoW, and getting Taunted on the switch. Taking a lot less than Florges from Lucario, Heracross, Mienshao, Mega Absol, Mega Sharpedo, and Machamp is the other part of it.
Porygon-Z: Yeah this hits hard but it's too slow and bad against every playstyle other than some forms of balance to go any higher. It doesn't do shit defensively either, the best it can do is come in once on like defensive Swampert or something. Plus, having Sableye here only makes things worse.
Sharpedo: I wouldn't place it any higher than where it is right now at C+. It's definitely below average as a cleaner, it doesn't have the power and it's way too hard to fit on a team.