IntroductionPheromosa here has only been around for a little while, but has already gained infamy as one of the deadliest sightings in Gen 7 OU. Heracross wept when its unique typing was usurped by not one, but two of these 'Ultra Beasts', and Pheromosa completely outshines it on the offensive front, with its blistering base 151 Speed and incredible base 137 offences. On top of its already impressive raw stats however, Pheromosa's trademark ability, Beast Boost, will only boost that Speed a stage higher for every KO it receives. Yes, as far as offensive teams are concerned, Pheromosa is an absolute disease. But what's holding this thing back from getting banned to Ubers, you ask? Why, its bulk of course. Or rather its lack of it. 71/37/37 sounds bad on paper, and it's even worse in practice. Literally any strong hit with end this fragile little bug, even some resisted ones. That's why Pheromosa needs to make sure it's going to kill whatever it hits. And fear not, it has just the right movepool to do so. It may look like it's been decided by dartboard, featuring your typical STAB moves, and then random stuff like Ice Beam and Rapid Spin, but Pheromosa is one of OU's biggest threats. Underestimate it at your own peril. Sets Quiver Dance Choice Specs Choice Scarf Life Orb / CB Other Options The Fightium and Buginium Z stones are viable hold items for Pheromosa, as they allow it to nail a target with a one off superpowered attack. All-Out Pummelling doesn't carry High Jump Kick's chance of missing, nor will it injure Pheromosa if the target evades it, while Savage Spin-Out won't force Pheromosa to switch out after usage, making it a tempting choice for sets that have solely U-turn as their Bug STAB. Various Hidden Powers are at least worth a mention, with Ground and Electric being the most popular. Hidden Power Ground hits common switch-ins like Toxapex and Gengar for heavy damage, while Electric takes on the many Water/Flying types that have sprung up in OU this generation, namely Pelipper, Mantine, and Gyarados. Low Kick is also worth considering if you desperately need a Fighting STAB with reliable accuracy. Bear in mind though that Low Kick's power is unreliable instead of its accuracy, and common targets like Ferrothorn receive as little as 40 BP damage from it. Checks and CountersPheromosa may be a tricky customer, however it also has its fair share of answers. The primary switch-in to Pheromosa would be its nemesis Toxapex, which resists every common move it possesses, and only falls to boosted Hidden Power Ground or Electric. If neither of these are present, Toxapex can tank hits all day long if it wants to, can Recover off HP as needed, and go for the KO with a timely Scald if it gets bored. Toxapex must be careful however, as Dugtrio is a common partner for Pheromosa. Pheromosa can simply U-turn out against Toxapex as it switches in, and Dugtrio can trap Toxapex with its trademark Arena Trap, then remove it with powerful Earthquakes and/or Tectonic Rage. Gengar's frailty holds it back, but as long as it can switch into anything but an Ice Beam, it can silence Pheromosa with a powerful Shadow Ball. Similarly, if Landorus-T or Gliscor can avoid an Ice Beam, they can both remove Pheromosa with relative ease. Note that this is only likely if Pheromosa is choice-locked into another move. Mega Venusaur and to a lesser point Amoonguss are solid initial switch-ins to Pheromosa, due to resisting its most feared High Jump Kick. Neither Pokemon appreciate its Bug STABs, and Amoonguss can't take Ice Beam very well either, but their solid bulk and access to recovery mean they can switch in repeatedly, and hit hard with STAB Sludge Bomb or Sleep Powder (Spore in Amoonguss' case) Assault Vest Tornadus-T makes for a solid revenge killer to Pheromosa, as it has the bulk to tank a Life Orb Ice Beam, and then KO with Hurricane. Tornadus-T must watch out for any Pheromosa with a Special Attack boost however, as Ice Beam will still OHKO after Stealth Rock damage in that state. Alolan Marowak lacks recovery, but can tank all of Pheromosa's common attacks with ease and then silence it with a Fire STAB, however it can't switch in repeatedly thanks to its Stealth Rock weakness and aforementioned lack of recovery. Jellicent is rare but also a solid answer to Pheromosa, as it resists Bug, Ice, Fighting and Poison, has recovery, and doesn't particularly fear any of Pheromosa's other attacks either. Mantine and Pelipper can also act as emergency checks to Pheromosa, being able to tank a hit or two, and then KO it with their STABs, as well as having Roost available to keep themselves healthy. Finally, if there is no Tapu Lele present on your opponent's team, feel free to bombard Pheromosa with all the priority attacks you have. Literally any will take enormous chunks out of it, if not outright kill.