C Rank:
C+ Rank
(C->C+) This thing is not terrible, certainly not as bad as Goodra, so it should rise to C rank. I would use this mon about as often as I would use Thundy-T, so it makes sense for them to be the same rank.
(D->C+) I will never understand what people have against this mon. Its AV set is easily the single best Lati checks in the game. It is strong, has Pursuit, checks Clef, Serp, Diancie, Gardevoir, Lati, and others. People see Metagross and instantly think "if it's not mega it's bad," but AV meta is still very threatening. I should know,
sugarhigh beats me with it consistently.
C Rank
(C- ->C) Not as bad as people think, and certainly not as bad as Forretress. I would put it in the same tier as the other Megas in this tier, as I would probably use it sooner than Mega Absol, but probably the same as I would use something like Chansey, i.e. only on certain niche stall teams.
(B- ->C) Seriously what is this doing in B-, I would use AV Metagross a million times before using Bronzong. Passive as fuck and doesn't even relaly beat anything besides Excadrill due to its lack of recovery (Sub SD Lando can set up on it if it gets intimidated)
(D->C) This thing hits ridiculously hard and doesn't have the nasty Rock typing that Terrakion has, meaning that it has a few perks over it. It also has access to Knock Off, better SAtk for HP Ice, etc. But the main reason to use this is Reckless LO HJK, which does insane damage.
(D->C) Some might look at this and think that it is simply an inferior Landorus-I, and they would be right, bt it's no so inferior that it should sit all the way in D rank. It is certainly more on par with the mons in this tier than some of the others. I would personally put it higher, but I'm not entirely sure its on the same level as Mega Amph or Pidgeot so C it goes.
(C+->C) This thing is a neat check to Zard accept that it has no recovery and gets fucked over by WIsp sets, so you're almost always better off going with Hippowdon. It has more offensive presence I suppose, but Rock Ground is terrible typing and it doesn't
really do anything Hippo doesn't do better. Not on par with the other C+ mons so it should be in C rank.
(C- ->C) I would use this thing about as often as I would use Gourgeist, Krook, etc. and by that I mean that it is largely outclassed by a very similar mon in all but a select few circumstances, but those teams that do use it well make it work, so it should be C
C- Rank
(C->C-) Trick Room mons should all be in this rank. TR is an ok gimmick, but it's just that: a gimmick. You win with it because your opponent was not prepared for it, and that's all. A strong Taunt mon, like Gengar, will shut down every TR setter, rendering the whole team useless. Certain mons like Reuniclus and Victini can pull off TR sets on their own that have merits, but dedicated TR mons like this are bad and should be C- rank.
(C+->C-) Lost a ton of viability when Lando was banned. Using this thing is like holding up a sign that says "please switch in your Bisharp, Scizor, or Tyranitar! Also it has the same issue as Cofag when it comes to the TR sets. More on par with stuff like Rose than Gourgeist or P2.
(D->C-) It's interesting, to say the least. Specs, CM, AV, LO Relic song are all sets I've used and though we all like to make fun of TRC and Jukain for approving it in early XY, it's not as bad as we all thought (sorry about that btw :p). LO sets make for ok cleaners when prio is gone, where as CM AV and Specs work as great Gengar checks, and can fire off powerful Psychic/Normal moves.
(D->C-) This thing is not outclassed by Celebi at all. I don't think people really understand that Leaf Storm is a million times worse than Seed Flare, ESPECIALLY on a mon that is Pursuit weak, but somehow people still use that Argument. LO Seed Flare hits very hard, and can threaten mons like Lati, which would otherwise be decent switch ins to it. The advantages it has over Serp are obvious, better bulk, more immediate power, and access to better coverage.
(C->C-) This mon is always super underwhelming when I use it. It seems to be on par with Roserade so I put them in the same ranking. Not super passionate about this one though.
D Rank:
(C->D) This mon is bad and should be D rank. Never in your team building should you have no mega, have a CM Lati, and then decide to use this mon. If you do, you have found the holy grail of teams, because there are so many mega Pokemon with so much more to bring to a team than Mega Lati brings. Regular CM Latios is perfectly fine and lets you use a whole host of other options. But ti should still be ranked (all Mega mons should imo), so D it is.
(C- ->D) Even as far as TR mons go, Pangoro is pretty niche. I would sooner use Exploud or Camerupt before this thing. Nor horrible, but TR is niche enough as it is, and this thing doesn't provide much defensive synergy outside of being a decent switch-in to Ttar (though Superpower still destroys it).
(C- ->D) This thing has never been good and it, like the other DDers in the low tiers, should be D rank. I would actually sooner use Salamence or Haxorus than this thing. It's really that bad.