Explain this:
Double Team and Sand Attack maxes out at 33.3% hit rate. This takes 6 turns to set up. This is banned.
Serene Grace Body Slam + Thunder Wave forces 30%* hit rate. This takes 2 turns to set up, deals damage, and induces a status effect. This is allowed.
*Serene Grace Body Slam forces 40% non-flinch; Paralysis forces 75% non-paralysis. Probability of getting through Flinch and Paralysis = P(not flinch)*P(not paralysis) = .4 * .75 = 30% success rate
Explanations I will not accept:
1. "It only takes 1 Double Team to snowball"
A: Stage 1 Evasion forces 75% hit rate. That's the same as paralysis. In fact when you use Thunder Wave, you are using permanently using Sand Attack + 2x Scary Face on that Pokemon. That 75% turns into 60% hit rate on the second turn, but 2nd turn Body Slam would have already forced 30% hit rate by then.
2. "Gen VI has nerfed Thunder Wave"
A: Not the point of this topic. Besides, Thunder Wave is still a common threat and will induce paralysis many times for years to come.
3. "You can Baton Pass evasion boosts"
A: Why did you let it set up evasion boosts in the first place?
Repeatedly trying to hit the Baton Passer while it's setting up evasion boosts then complaining when you get swept is the same as repeatedly trying to physically attack the Baton Passer while it's setting up Iron Defense then complaining when you get swept. Back in my day, we had this thing called a Phazer that forces switches.
4. "There are no good Pokemon with Keen Eye, etc."
A: Remember when Hitmontop was considered a bad Pokemon? You only consider certain Pokemon bad because you have no utility for them. But if utility is developed for that Pokemon, then they become valuable. Keen Eye, etc. Pokemon are considered bad because you have banned their utility in the first place.
5. "So, are we supposed to run Swift, Hone Claw, now? But they suck!"
A: This is circular logic.
"Anti-Evasion moves are bad because anti-evasion moves are bad in the first place."
Anti-Evasion moves will become good if there is a need for their purpose. Remember, Technician boosts these to 90 BP.
6. "This will just create one more threat to have to counter!"
A: I thought you wanted to de-centralize the metagame in first place.
1. You have shown absolutely nothing with that "calculation" because it's not only based on the opponent playing bad, but it doesn't even work anymore after a kill; Once your paraflincher kill something or the opponent switches out, he's back at 100% hit chance, Evasion, on the other hand, stays the same, THAT'S what snowballing is about; Not only that every time you miss, it boosts further, once an evasion boosting mon grabbed a few boosts, it get's increasingly harder for every consecutive pokemon to beat it. That simply isn't true for paraflinch.
2. No, it isn't because it suddenly turns all electric pokemon into hard counters to paraflinch.
3. That's a non-sequitor; Unless ALL pokemon in your team carry roar/whirlwind/100% moves, it's always possible to grab at least one boost, and that can already be enough to go to town, especially since double team is so common that it's hard to prepare for all of them.
4. & 5. :Both anti-evasion-moves and anti-evasion-abilities are generally highly specialized, meaning they're useless against everything that isn't evasion-boosting and/or have a very limited distribution, with phazing being the sole exception; Not only that, but they are even quite likely to fail to actually counter that ONLY threat they do anything at all against; 100% moves have a very low base power, phazing always moves last, meaning the opponent can always baton-pass OR just OHKO(which isn't to unlikely since the amount of decent phazers in most tiers is limited, meaning you can specifically prepare your moves/choose your booster to beat them), Keen Eye only works against accuracy-lowering , which is already legal etc.
So, the only way for them to become decent would be if evasion-boosting would become so dominating that you run into it all the time - which is already a bad thing in itself.
6.Who even said that?
Also, aside from your "counter-arguments" failing to actually counter arguments, you even state several things that are factually wrong or severely misleading:
1. Sand Attack isn't banned, and a completely different thing from Evasion boosting
2.Keen Eye doesn't work against evasion boosting - the strategy we're talking about - but only against accuracy lowering, a strategy that, as already stated, isn't illegal
3.Body Slam doesn't flinch, it paralyzes - and that with a chance of only 60%. The moves you're looking for are Air Slash and Iron Head, which are the only 30%-flinch moves that are accessible to most serene-grace users(with the exception of great attackers like dunsparce or blissey, who have access to a few others). Both Air Slash and Iron Head are resisted be Electric Types.. Seeing a pattern there?
4.Not even mentioning minimize, which is an all-around better double team, is EXTREMELY misleading when your point is that evasion-boosting "isn't that bad".
5.Actually, the whole comparing-paraflinch-to-evasion-boosting is misleading because only very few pokemon have access to paraflinch & they have definite hard counters. Also, as said, there is no noteworthy snowballing with paraflinch. Evasion-boosting, on the other hand, is even more common than other usable boosting moves, therefore quite likely to make even your designated counters fail, and, well, snowballing.
Not to mention all the other differences, like the fact that paraflincher need to continously attack with the same move over and over or that simply switching out resets everything again.
Persian and Ambipom both have STAB, Technician-boosted Swift which can be further boosted by Nasty Plot. Roserade has STAB, Technician-boosted Magical Leaf. On the subject of new additions, MegaLucario has Adaptability boosted Aura Sphere.They would be very effective at their job, if that job existed.
On Parafusion, MegaKhan is a really good idea. I've been running Bite on mine to hit ghosts, and for the flinch chance if I have nothing else to fall back on; combined with Stomp/Fake Out|Power Up Punch/T-Wave, he could actually run a very similar set to Togekiss which I never thought about...
Both Ambipom and Persian have so terrible spA that they're not much stronger than a swift from any other pokemon. Only Roserade and MegaLucario have legitimately decent 100% moves, but both still aren't hard counters; MegaLucario can''t deal with ANY Ghost that's evasion boosting, and also some mons resisting fighting, Roserade not with any mon resisting grass OR outspeeding and OHKOing it, which isn't to unlikely given its middling speed and meager defenses.
I know I stated a few things several times, but they simply were too important on several different points.