What is this post trying to do? What is that calc supposed to prove....
By this analogy
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252+ Atk Choice Band Talonflame Flare Blitz vs. 252 HP / 223+ Def Skarmory: 272-324 (81.4 - 97%) -- guaranteed 2HKO after Leftovers recovery
Talonflame is a shit pokemon with zero wallbreaking potential
C'mon, stop screwing me, since when was Talonflame a wall breaker = =?
With a download boost, STAB isn't really needed. Plus, Genesect getting a STAB U-Turn helps it immensely in putting other Pokemon into a checkmate position and grabbing momentum.
Momentum, a term that has almost never been meaningful for stall teams = =, stall teams are so passive to consider about that.
Iron head is pretty common on Genesect too. The only thing that can take neutral special hits, U-Turn and iron head is heatran, anything else loses a large chunk of health. A download boosted STAB U-Turn is by no means passive damage,
It more often than not damages the Pokemon that takes the U-Turn enough to be OHKOed by the next Pokemon that comes in. That seemingly passive damage can be important in several situations.
You don't handle the download on the two side with the same way, if it is on the phyiscal side you are fine as long you don't get hit by SE(of cuz no bug weakness please), if it is on the special side, just overcome it with sheer bulkiness can be a solution.
Of course Gensect still has enough switch in opportunities. 75/95/95 defenses combined with a load of resistances even excluding ghost and dark is still pretty good. I mean, Scarf Genesect was one of the top Pokemon in Ubers last gen. If it was able to find switch in opportunities there, it's pretty obvious that it has few problems switching in the current meta.
If you actually consider that Genesect tends to be useless(like many scarf mon) in the late game, it has to switch in multiple times earlier to compensate.
I'm not sure what positive aspect you're talking about. Gensect can be a powerful sweeper with the right set. It's scarf sets turn turn ice beam, flamethrower and U-Turn weak Pokemon into free momentum. It restricts teambuilding to not include too many of the aforementioned Pokemon in your team.
Choice-locked poke are never good sweepers. Back in Gen V it was all those outrages and rain hydro pumps that powers through things
EVEN IF IT IS RESISTED. And without a scarf Genesect is losing its major niche as a quick pivot and revenge killer
Aside from the fact that the only prevalent protect users in OU are Sylveon, Gliscor and Chansey/blissey, there's also a chance this happens-
"Pokemon X used protect!"
"Genesect used Shift Gear/rock polish"
Derp....
Well, stall teams use protect a lot more often, especially when one is running things like toxic/WoW/leech seed, and one extra turn of leftover more than often proof itself invaluable, it can also be used scout move sets...... the OU stats doesn't necessarily show that because stall is not a common play style at all...... not only because full stall is slightly inferior to the meta but that most people don't want 50 turn games, which is already considered short for stall players......
Also, +1 is nowhere threatening to stall teams when +2 are the one they are supposed to wall, and who cares about the speed when I am slower anyway? It should also be noted that, while I was not there back in Gen V, I can safely claim that the rock polish set is only powerful because the meta was so frail back at those days, and viable walls tend to be very specialized which leaves holes else where.
The Scarf set is a joke against stall teams and it isn't a reliable Pokemon to deal with it. However, the enormous information asymmetry that an EBelt user can maintain throughout the course of the match against stall (and other teams to a lesser extent) is probably a good argument against it ban. Its unpredictability and scarcity of viable hard counters (Heatran and to a lesser extent Conkeldurr) are what makes it so dangerous. Similarly, Keldeo can also maintain its EBelt bluff quite easily too, but it has fewer rewarding opportunities where it can switch its moves, due to the nature of its STABs and HPs it can viability run. A relatively healthy Celebi, Lati@s, and Jellicent really doesn't mind if a non-LO Keldeo switches to its super-effective Hidden Power against them (and being hit by a Hidden Power at least narrow down the identity of its Hidden Power). They can check Keldeo in many situations, regardless of whether it has EBelt or whether there is no information on the identity of its HP move.
I am now slightly pro-ban due to its unpredictability argument as three (or four) different sets are viable (Scarf [concerning the Scarf set, the EVs really do not matter, but whether it is using an additional Special coverage move or Iron Head as its fourth move], EBelt, and Band), although I do not want Genesect immediately banned.
Genesect does have wall-breaking potential. It is the called the Expert Belt set. It does not rely on STABs or items, but rather its ability and coverage, and most importantly, deception and information asymmetry.
I don't actually think the expert belt is so much an issue, ever since Gen V stalling is becoming a very anti-meta play style as you may know. Information management is always an important topic for stall players due to the necessity to do prolonged decision making, which is less so for offensive teams as you may not even have a chance to see all their moves anyway.
In fact, unless the Genesect is specifically built to screw stall teams(yeah, one certainly can build something like that, I may just pick up Kyu-B though), the item choice can be rather obvious at stage of team preview. And at the early stage of game, at least for me, I would spend quite some time on scouting the enemy. Plus, expert belt has always been the kind of surprising factor ever since its introduction, if it is shown on the stats, we know how to do the analysis.
But of course, most importantly 90% of stall teams will throw in specially defensive Heatran regardless, yup, stalling is pretty dull this generation as Megasaur/Heatran is basically everywhere.
Another note, I have tested out the Choice Band set a bit, perhaps I was not using it correctly, but stacking physical attacks do not seem powerful at all(that coverage), and the download boost is so unreliable.
One more side note, if iron head is spammed against dedicate rock helmet users, you may actually be the one to die first, really, one turn of healing is enough.