== General == Holding the esteemed title of 'pokemon #666', Vivillon was met with high expectations at first. Boasting multiple aesthetic variations was a nice touch, but the dainty butterfly didn't seem even close to deserving of its #666 title. However, that was until people actually starting using it properly. With Compoundeyes and Sleep Powder at its disposal, Vivillon is essentially a Butterfree, but better, with identical Special Attack and far superior Speed. A base 89 still isn't amazing, but access to the incredible Quiver Dance turns Vivillon from a simple butterfly into a killing machine. However, Vivillon's main selling point over the myriad of generic bugs in NU is its access to Hurricane. With its accuracy boosted by Compoundeyes, the move essentially becomes a 91% accurate nuke, which Vivillon is all too happy to spam, boasting great power and coverage at the same time, with a decent chance of confusion to boot. This makes Vivillon very difficult to properly deal with. Vivillon may be very simple to use, but as expected, the butterfly is also terrible frail. Your average priority moves will take more than 40% from it, meaning it'll likely be dead after Stealth Rock damage and one attack. A spinner or Defogger is therefore almost necessary to use the bug properly. When all is said and done though, anyone who says they used Vivillon and were disappointed by it, is a liar. 666 is the number of the butterfly. == Quiver Dance == Vivillon @ Focus Sash / Life Orb Ability: Compoundeyes EVs: 4 Def / 252 SAtk / 252 Spd Timid nature -Quiver Dance -Sleep Powder -Hurricane -Bug Buzz / Endeavor / Giga Drain This is Vivillon's flagship set, in just about any tier. Simple to use, hits hard, hits fast. What's not to like? Sleep Powder incapacitates a switch in (ignoring immunities) with 97% reliability, meaning you're guaranteed at least one Quiver Dance boost, and maybe even two if you're lucky. A 91% accurate Hurricane is the primary attack, with little resisting, and even less sufficiently tanking it at +1. Even after that, you've got the confusion chances, meaning Vivillon is extremely dangerous with it. Slot 4 has Bug Buzz for alternate STAB, Endeavor to complement the Focus Sash and cripple an incoming tank such as Mega Camerupt or Steelix, rendering them very vulnerable at 1 HP, and Giga Drain's also there to keep Vivillon healthy. It breaks into Rock-types too. The Focus Sash is the first listed hold item, as it practically guarantees its survival as long as it switches in without taking damage. This can be difficult, however Rapid Spin or Defog support is recommended to maximise your chances. If you find the Focus Sash never working for you however, the infamous Life Orb is available as a back slash to simply hit harder at the cost of 10% HP per hit. Vivillon rarely lasts long anyway, so it might as well optimise its damage output. Giga Drain also complements the Life Orb too. Vivillon is a simple pokemon, so it makes sense that its EVs are just as simple. Vivillon's HP is kept odd for maximal switches into Stealth Rock (though you should probably spin them first), while the Special Attack and Speed are maxed out, and the remaining 4 EVs are simply dumped into one of the Defences. Timid is preferred over Modest for as much Speed as possible. == Other Options == Psychic and various Hidden Powers are basically all of Vivillon's remaining movepool. Roost can keep it healthy, but it'll probably never get a chance to use it. Vivillon's signature move Powder can outsmart opposing Fire-types, and even wall the likes of Camerupt if you play well. Shield Dust can bypass the likes of Fake Out users, however the accuracy drop WILL come back to haunt you sooner or later. The likes of the Leftovers and Choice items shouldn't even be considered, as Vivillon is far too frail and Stealth Rock weak to consider tanking moves or switching more than once in a match. == Checks and Counters == This is actually a lot more difficult than you might think. The little butterfly packs a surprising amount of power, and its deceptively good accuracy makes for a tricky customer. Even at +1, Vivillon's special bulk is fairly average, and therefore it can be taken out quite easily. Electrode for example can come in on a Quiver Dance, take a Life Orb resisted Hurricane, and still deal a solid ~90% to Vivillon with Volt Switch, which is an easy KO after Stealth Rock, and likely KO after just Life Orb recoil. Electrode's Soundproof makes it immune to Bug Buzz. Physical Mega Abomasnow can boast basically the same thing, being able to come in on anything but Hurricane for free thanks to Soundproof (pre mega), and then cut Vivillon down with an Ice Shard for about 90% damage. Speaking of priority, most strong priority attacks are a good means of bringing Vivillon down. If it's already taken damage (most likely from Stealth Rock), then even the likes of a STAB Aqua Jet can do it. Choice Band Feraligatr scores a clean 52% minimum, guaranteeing the kill on any Vivillon after Stealth Rock damage, while a STAB Sucker Punch from the likes of Skuntank can easily match this feat, however be wary of Vivillon trying to set up on Sucker Punches. Choice Scarf users that are faster than base 90 can easily revenge kill Vivillon, particularly if they are physical attackers. These include things like Primeape and Heliolisk. Fletchinder's itemless Acrobatics has a +1 priority thanks to Gale Wings, and will easily OHKO Vivillon as long as it can switch in safely (i.e. on Quiver Dance only). Prankster users like Volbeat or Whimsicott can easily Encore Vivillon into repeatedly Quiver Dancing (or in Whimsicott's case, using Sleep Powder), then whittle it down with their moves of choice. However, this is only if they can switch in safely, as neither will like a Hurricane to the face.