When your Tyranitar nom was so long ago it doesnt even get mentioned and even totally forgotten as AGs most viable Rocktype lmao.Regarding other noms:
Vivillon B- to B+/B: Agree - This Pokemon is some broken ass shit if you don't think this Pokemon should move up you either a) Haven't abused this shit or b) haven't been abused by this shit. All jokes aside though as much as I despise this Pokemon it definitely deserves to move up.
Celesteela A- to B: Agree
Skarmory B+ to A-: Agree
Necrozma Ultra A to A+: Disagree
Lunala B to B+: Agree
Gothitelle B+ to B: Agree
Scolipede D to C: Agree
Arceus A- to A: Agree
Naganadel D to C-: Agree
Slurpuff UR to D: Agree - I've seen quite a lot of people disagree with this but honestly I think a web setter than can beat Mega Sableye and not be stopped by taunt deserves a rank.
Shaymin - Sky UR to C: Disagree - C is definitely too far of a jump, and I think bdov nommed this for D already and it got rejected so I don't see any changes here, end of the day is a pretty weak mon and Z celebrate has not been enough to save it.
I think the point of the matter is that rock is just not a good type to use in AG. There are no other viable Rock types in AG, barring Solrock if you want to be really out there.
Sharing the opinions on changes execpt on Ultra-Necrozma where I am a little bit torn so I am not sure whether or not it should move up or stay where it is. Using Skymin you are basically relying on 60% chances everytime as most Mons only need one turn to either ko or cripple it and I would rather use Hypno-Gar in that regard. Nonetheless I could see it at D rank as it still has a good speedtier, hax potential and healing wish in its repertoire.
Agreeing with Rockceus too as it just doenst have much going for it rn.
Giratina can also Defog against almost everything on Webs that doesnt have Taunt/Explosion/ is Vivilion.
Excadrill is also a decent lead against others (bar Cloyster) being the best Rapid Spinner in the Tier followed by Cloyster and Pheromosa.
One thing I definitly want to see is Celesteela dropping as it might be still annoying to some teams but its flat out no A material at this point with alot of things (especially Sub Sweepers) setting up on it or not caring about it much + Leech Seed alone is not reliable recovery as one might have seen with Ferrothorn the supposed Kyogre check still getting threatened by waterspout / CM Ogre.