Let's not give yourself too much credit, here: Victini was not popularized by your RMT, and frankly it isn't even popular, period.
I don't see how listing all of Victini's options helps me understand the mon, especially when all of your suggested moves and sets bar like 2 are borderline gimmicks or simply unviable. With your argumentation you'd have a field day making Mew sound broken.
I don't see how having a Fire type that lets itself be revenge killed every time it uses its main STAB is helpful to the majority of teams when so many other Fire types exist. Being weak to all entry hazards severely cuts into its supposed bulk, not that its typing does it any favors in this regard. I'm a huge fan of losing my breaker to both Dugtrio and Pursuit, thanks. Oh right, the scarf set also dies because V-Create lowers your own speed...
Its only niche is being a Fire-type with access to Electric + Ice coverage, which sounds fantastic until you realize that it has a subpar matchup into virtually every playstyle even though it beats some highly ranked mons 1v1. It's setup bait for everything on Veil (do not use Glaciate as your argument, since then you're basically admitting that it's sack fodder), it gets 1 kill *maximum* versus stall and most likely 0 if your opponent is smart, and it's revenge killed by almost everything faster that you see on other archetypes (Greninja, Koko, Garchomp come to mind). It's laughable that you claim it counters Magearna when Electrium Z is so common, notably CM Electrium Z which just OHKOes you at +1 after SR. I can see a small rise for this mon but there is no way it deserves B-/B+ with so much competition for a team slot. Fire type breakers are incredibly common, and most are far less prediction reliant and/or prone to chip damage. As for Choice Scarf...I mean, if you really needed a Fire type for some idiotic reason, Infernape exists and can actually revenge kill Volcarona + Magearna safely. In practice I could never see myself using Victini over another Fire type unless my team was awkwardly constructed.
OK, thanks for your reply. I suppose that I have not done a good job of explaining myself in my previous post, judging from the ratio of likes between yours and mine, and it was my mistake for assuming that my point that Victini should warrant a rise from C- was self-explanatory. It occurs to me that a large majority (>90%) of the audience here has not used Victini, or even seen it in action before, and therefore cannot agree or must abstain. Let me attempt to clarify your points and I hope this will help people understand better.
You're right about Victini not even being popular, lol. But I want to make it more popular, as it deserves. It is certainly an underrated threat.
Can we first consider
what can switch into Victini? Few in the OU metagame can switch in safely into V-Create. Those that resist V-Create are either 2HKOed itself, or themselves are defensive threats that can be 2HKOed by Bolt Strike. This means that Victini (one Pokemon only) can have an advantageous matchup against offense. Against fat defensive answers, Victini has access to Trick to cripple them for the rest of the match. Can other Fire-types like Infernape (not even a good Pokemon in OU), Heatran, or Volcarona claim to have such potential?
OK, so now we've established that few mons except tanks can switch into Victini. That alone is enough to put it into B ranks, but let's continue.
Yes, it is weak to all entry hazards. That is indeed a weakness. However, you as the teambuilder should take this into account and employ proper hazard removal measures. Volcarona is even weaker yet it is A+. Megazard Y and Mega Pinsir take a whopping 50% from Stealth Rock, yet are A. Being weak to hazards lowers its "viability score", yes, but only by a little.
It is also weak to Dugtrio, yes. Again, so is Volcarona, Heatran, even Toxapex. It is not even a fair comparison if you want to list Victini's weaknesses. But despite this, what's going for Victini here, is that it would have already killed an opponent's Pokemon, before Dugtrio traps and kills it. This is already success. And, this is the
best case scenario for Dugtrio, it cannot safely switch in at all no matter how you think about it. And Victini has counterplay to U-turn out if the opponent thinks of hard switching Dugtrio into Victini, so Victini lives on.
Interestingly, a non-Banded Dugtrio cannot OHKO Victini at full health: 252 Atk Dugtrio Earthquake vs. 0 HP / 0 Def Victini: 272-324 (79.7 - 95%) -- guaranteed 2HKO
Your comment about "Pursuit" makes me very suspicious. There are very few Pursuit trappers in the OU metagame, because of the uncommonness of Ghost and Psychic types in the tier. Only Gengar and the Latis come to mind. It almost as if you are theorymonning, but since you likely haven't used Victini before, I don't blame you. I mean, OK, there's Tyranitar, but it in itself is a Victini check already.
Victini, as most wallbreakers, have a hard time against Veil, but do note that the Victini user has the immediate advantage of threatening out Ninetails 1v1, and gaining momentum for the game. Do you not think that this is a favourable matchup?
You claim that Victini is revenge killed by many things. That is in fact true to some extent, but you neglect the fact that every time Victini comes in, it kills an opponent's Pokemon. All Victini needs to do is to switch out to avoid being "revenge killed". Don't forget that you have a team of 5 other Pokemon to handle common threats. So, the end product is that you have a live Victini, one of the opponent's Pokemon dead, and the momentum reset.
In conclusion, Victini is a fearsome wallbreaker and something on the opponent's team dies whenever it comes out on the field. Thanks to its multiple resistances and good bulk (except for Rock, just get it off the field), it can do so many times. Does this description not sound worthy of B rank now?
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As for Magearna, you must be quite stupid if you let Magearna set up Shift Gear + Calm Mind (2 turns) and also Stealth Rock (3 turns) to let Victini die. Even God can't save you then. Neither can Infernape, what exactly are you talking about?
And, Victini eats a +1 CM Gigavolt Havoc, if only you don't have Rocks on the field.
+1 252 SpA Magearna Gigavolt Havoc (175 BP) vs. 0 HP / 0 SpD Victini: 286-337 (83.8 - 98.8%) -- guaranteed 2HKO
And Victini is not "prediction reliant", if you read my post you will notice that I implied that Victini is a "click V-Create to win" kind of Pokemon. Prediction only comes in if there are checks or counters on the opponent's team, but this applies for every Pokemon on this viability ranking, so the argument is moot.
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I hope this clarification helps explain my thoughts on Victini clearer, since I do see that many do not understand how it can work in practice from my initial post. It has several weaknesses, yes, but all Pokemon have weaknesses. And it is clear that its strengths outweigh its weaknesses, definitely more than it deserves in C- rank. Victini should definitely be ranked above the likes of Nidoking, Primarina, Infernape, Porygon-Z.
Again, I would love to know if there are any more thoughts on this proposal.