K so I'm gonna make a few noms here.
Gothorita: A+ --> S+
Reflecting the current discussion in the tiering council about Gothitelle and Gothorita going to ubers. TBH its insanely borked here anyway and I can't wait to give it an official ban, but for now S+ will do for this thing.
Ivysaur: A- --> B
Ivysaur is outclassed by Weepinbell for the most part. Weepinbell's access to Weather Ball in conjunction with Chlorophyll makes it so hard to justify using the weaker Ivysaur over it.
Onix and Boldore: A- --> B-
These are both outclassed by Graveler for the most part. Ranked way too high and should drop.
Prinplup: B+ --> A
As one of the premier Defog users in the tier, its pretty self-explanitory here. Also fat waters are hard to come by, giving it a pretty big niche. Prinplup is really good in the current metagame.
Vibrava: B- --> A
Yeah we've been severely underselling this thing. Between its incredible typing, good natural bulk and access to Defog, this Pokémon is really useful for a lot of teams.
Gabite: B+ --> A-
Gabite is also really good. I think Vibrava's access to Defog makes it slightly better given are limited options, but Gabite's niche is definitely very big. Rough Skin and Stealth Rock are very valuable assets.
Timburr --> Unranked
Please don't use this thing. Its literally a worse Machoke.
Vigoroth --> S+
Really, really good. Sub+Bulk Up is actual cancer.
There was also one other nom I was gonna make but I've forgotten it so it can't be that important.