choo choo here comes a vr update
Rises
Cobalion rises from A to A+ - Cobalion's Swords Dance sets have popped off lately with the ban of Aegislash, and it's still an ever-reliable Stealth Rock setter. Being able to customise coverage to some extent to cover otherwise mediocre matchups gives it strong versatility, and its defensive utility as a Scizor and Zarude check is still very valuable, so it joins the upper echelons of the tier.
Celesteela rises from A to A+ - Celesteela's offensive sets have seen a meteoric rise lately, being able to dumpster a ton of common defensive structures that rely on Hippowdon as a special blanket. Defensive sets are in a decent spot too, being good checks to Diggersby, Togekiss and more.
Diggersby rises from A- to A - Big chungus is the best Scarfer in UU and rises to reflect its great offensive potential.
Keldeo rises from A- to A - Finally in a decent spot, Keldeo's pretty good at bursting down most of its frailer checks and has few matchups where it's dead weight thanks to its good offensive / defensive utility as a wallbreaker. Less Slowking / Primarina usage is great for it too.
Azelf rises from A- to A - Azelf's Expert Belt set has taken off, being incredibly tough for a lot of teams to handle. Its great Speed tier being above Keldeo and Cobalion is very valuable in this metagame.
Togekiss rises from B to B+ - Togekiss's defensive utility is as unique as it is valuable, being able to check all of Zarude, Salamence, Hydreigon, Noivern, Azelf, Conkeldurr, and Keldeo in a single teamslot. Nasty Plot variants are really tough to beat long-term right now, as teams reliant on Thundurus-T or Skarmory as their Flying resist just get shredded by it, and teams that use Scizor or Cobalion can often have no Flying resist at all.
Hatterene rises from B to B+ - The matchup witch has been stronger lately thanks to her ability to dumpster the increasingly popular Skarmory. Every turn against Hatterene can be a 50/50 if you're lacking a dedicated counter such as Celesteela; Pokemon like Scizor really can't switch in safely at all. It still has some shortcomings, particularly in the Hydreigon matchup, so it doesn't see a huge rise, but it is strong at the moment.
Noivern rises from C+ to B+ - Noivern sees the biggest jump in these shifts after finding itself explored a lot more recently. Its Speed tier is immensely valuable at the moment, beating out all of Keldeo, Cobalion, Azelf, Raikou, Thundurus-T, Starmie and even some Crobats, and it's got decent defensive utility into stuff like Cobalion, Zarude, Scizor and Skarmory. Competition with the amazing Salamence is tough, but Noivern's Speed tier lets it show up on an increasing number of teams. Turns out that fast Pokemon with good coverage are pretty tough to handle if Spikes are on the field. Who knew?
Articuno rises from C to C+ - Articuno is becoming a genuine threat on fatter teams thanks to the amazing compression of Heal Bell + Defog, and it's got a pretty good matchup into hazard setters like Hippowdon, Skarmory, Swampert and Nidoqueen. It's still very limited in terms of what kind of teams it can fit onto, but it's got a respectable niche that's worth considering for fatter balances and stall teams.
Seismitoad rises from C to C+ - Seismitoad's Water immunity is really nice at forcing mindgames with stuff like Keldeo, and it blanks Rotom-W, which is increasing in popularity, quite hard. It's a reliable Stealth Rock setter that most hazard removers don't really like taking on one-on-one, and it packs good utility between Toxic and Knock Off, so it sees a modest rise.
Vanilluxe rises from C to C+ - Most common Steel-type is Scizor that doesn't run a whole lot of Special Defense investment. Blizzard is a strong move. Vanilluxe doesn't miss Blizzard. Vanilluxe owns a lot of teams. You get the point.
Magneton ranked at C - Most common Steel-type is Scizor that doesn't run a whole lot of Special Defense investment. Thunderbolt is a strong move. Magneton doesn't miss Thunderbolt. Magneton owns a lot of teams. You get the point.
Jellicent ranked at C+ - Jellicent has some cool defensive utility as a hard Keldeo counter that dumpsters a lot of balance structures via Taunt. It's also a somewhat workable Scizor check and stuffs most Cobalion variants.
Sigilyph ranked at C - Being a Defogger immune to passive damage is unique and cool into a lot of more passive stuff like Skarmory, Swampert, Hippowdon and Seismitoad. Sigilyph can also be annoying to switch into in its own right for teams lacking Slowking.
Drops
Nihilego drops from A+ to A -
Mandibuzz drops from A to A- - Mandibuzz just doesn't check too many relevant threats at the moment and faces serious competition for its role from stuff like Salamence and Celesteela. It's still good and has a unique defensive profile, but that profile is not super in demand rn.
Conkeldurr drops from A- to B+ - Making a team that doesn't suck with Conk is a real headache by nature of the mon's awkward Speed tier and constantly chipping itself down. It hasn't really gotten that much worse per se, but it was overranked to begin with.
Azumarill drops from A- to B+ - The meta hasn't been too kind to Azu, Regen Grasses are everywhere as usual and a slow breaker without much defensive utility can really struggle to get onto the field. Primarina is better at most of what Azumarill tries to do thanks to its better Grass matchup, much higher power, and the fact that it's more versatile.
Lycanroc-D drops from B+ to B - Hippo and Scizor really sent this dog back to its kennel, but it's been falling of for a while anyway. Uptick in Skarmory isn't great, and Lycanroc, while dangerous, tends to faint before getting enough done. It can still work on the right composition as its offensive talents are unique, but it's niche overall.
Salazzle drops from B to C+ - Salazzle just doesn't show up anymore, that's the main issue here. Its offensive potential is still good but it's kinda walled by Hippo and getting it onto the field in the first place can be a challenge. Still gets some points for being a Bullet Punch resist but it's a bad one so eh.
Toxtricity drops from C+ to C - Doesn't really have a niche, probably should've been unranked. Shift Gear sets are still potentially lethal against Chansey / Excadrill teams, which is why some voted to keep it on the VR.
Sirfetch’d, Klefki, Diancie, Scrafty, and Stakataka all drop from C to UR - These just don't have any real niche in the current metagame.