Hello fellow RBY ubers nerds
Here is my quick ranking in order from tier, although the bottom tiers are kinda messy so don’t take too much from it:
*Edit: I forgot to add some lowtier trash, (I mean viable… mons” - If you’re wondering on the absence of trode, kingler and such.*
S tier: The GOATs. There are two and only two; anyone who says otherwise is likely drunk. At times it’s worth mentioning the Mew has consideration for the #1 spot (biased aside if you know me). Against very good players Mewtwo seems to act more defensively, almost like a chansey, albeit with the clear offensive threat - that is conveniently blocked by said chansey or an opposing mewtwo. This leads to M2 freeze wars or boomtwo.
Mew on the other hand couldn’t care less. However it’s main drawback is it’s available movepool, sometimes getting (almost or entirely) walled by gengar, zapdos, or rhydon, depending if you’re running mono normal or only quake. For this reason it’s hard to put Mew at #1, although I like to consider both Mews pretty close regardless.
A - These are your core mons that help your progress, or in tauros’ spot, finish (side note, leading tauros is a niche play and it’s main job is to finish not lead). Lax is probably the most common mon outside of the mews for good reason - It does great damage, tanking ability, can para, can boom, has quake, and can scare your opponent with the threat of counter. Reflect rest sets work, albeit way less than in OU, but they’re also an option. Chansey sees a decrease in viability in this meta, I think people began to see this more sometime in late 2023. It’s hard to progress with it at times, although seismic toss for plain and guaranteed damage seems to be the best way most of the time. Having a backup sleeper with sing is always a plus. Eggy just works almost all the time; being solid typing, having stun and sleep, and ofc boom which is a forever staple of the tier. Notably, Egg is a solid Mew check, as well as the other more obvious mons on the list purely based on typing.
B - I’m going to run through this a bit faster. Gar being the faster sleeper, rhydon being the best ground/rock (tailwhip/sub is damn good when you throw it in on a paraed mon, especially to deal with the mews). Zap needs no explanation. Slowbro starts to be one of the less widely used (widely used mons, lol) although it has good defensive bulk spreading paras, and can quickly be an unlikely offensive powerhouse with amnesia if the opponent isn’t running chansey, doesn’t have electric moves, or is simply not paying attention to the threat. Jynx is a solid lead with a best *sleep odds to speed ratio* in the tier. Nothing more really. Zam just can’t do much in ubers like it does in OU; simply because of the presence of so many strong or recovery psychics in the case of the mews and slowbro. It can however be okay if you need a fast mon to deal with something like a player who spams the raging bull, but I wouldn’t place my bets on it much. Jolteon does what zapdos does, worse but also with more variability.
C - I won’t speak for all these. They are players but with a more specific team oriented play style. Hypno plays great against lead M2, cloy as it does in OU, golem as a budget rhydon with BOOM, etc. Starmie I want to note is arguably the most significant decreases in viability in terms of OU to ubers IMO. Its ability to really do good usually comes down to if it can get some helpful rng with paras or crits along the way. If the objective is spreading paras, there are simply better options, and damage just isn’t there.
Niche - Yeah we got the wrappers and what not. A few mons that have tried and sometimes succeeded, but if you’re really trying to win you won’t see these guys much, unless there is a *clear* reason to use them.
Arc - Fire Doggo with good stats