Due to the recent resurgence in posts about that
thing, I'm not going to bring it up at all in this post. Instead, time to back up a few actually relevant nominations that I've seen over a couple days. Unfortunately, I'd mostly be repeating arguments here, but they're all completely true and I've stated a lot of these myself. Without further ado, let's go.
Mega Steelix (A+) -> S | Ah, Mega Steelix. Everything's been said about it, but I can't emphasize enough how quickly this Pokémon has become such a dominating force in RU. Between a SR setter, a Curse attacker or even SR+Curse, Mega Steelix will always do a shitload in battle without even trying. It sets up SR and immediately pressures its opposition with its 125 Attack and powerful STABs. After a few Curse boosts, the only things stopping it are phazers, provided they can even take a hit from this titanium behemoth if it has already boosted. At the expense of coverage or utility, it can even run SR
and Curse on one set. Speaking of utility, there's a shitload Mega Steelix can slap onto its fourth moveslot: Taunt to stop defensive Pokémon and Defoggers, Roar or Dragon Tail to phaze other boosters out, and even Explosion if it's at the end of the run and
needs to get the KO. With all this said, I haven't even gotten to its stats yet: 230 Defense is absolutely
astronomical and lets it tank hits from Medicham and Hitmonlee while OHKOing back. Absolutely no physical attacker is ever getting past even an uninvested Mega Steelix; considering its Defense is so massive anyway, it can invest in Special Defense to take hits on both sides of the spectrum. Offensives approaches with max Attack work just as well, granting Mega Steelix a lot more power right from the get-go and letting it get rid of opposing hazard removers with ease.
Its weaknesses are pretty glaring, but considering it has many resistances
and two immunities that let it absorb status for its teammates as an added bonus, as well as Pangoro and Moltres having gotten the boot, there's almost nothing stopping this behemoth from doing what it needs to do with great success.
Mega Steelix deserves to be S. If anything make it S+ because it's so fucking awesome in the meta right now Just joking, S is good enough.
Also yay update soon :D
EDIT: On a final note, if someone's making a new image, it could be Mega Steelix in the center, with Cobalion and Cresselia on its sides and then add a banner to it, kind of like a coat of arms. Just a suggestion for anyone interested in making a new artwork for the thread.