Skarmory @ Custap Berry
Ability: Sturdy
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Stealth Rock
- Spikes
- Brave Bird / Iron Head / Taunt
- Brave Bird / Iron Head / Taunt
Role: Hazard Setter
What It Does: Custap Skarm is an excellent hazard setter for teams (especially Hyper Offense, or really aggressive Bulky Offense) that rely on hazard stacking, due to access to both Stealth Rock and Spikes, as well as an excellent ability in Sturdy, which makes it one of the few Pokemon with that role that don't need to run Focus Sash to be effective at it. Custap Berry allows Skarmory to use one move at the front of its priority bracket once it gets down to 25% HP or less. This gives it a very good chance, though not an absolute guarantee, of getting a minimum of two hazards up (at least three if your opponent has to switch into something to better handle Skarm that doesn't have a priority move), giving many teams a serious edge if played properly. Other than the two hazard moves, the remaining two slots can be filled with any combination of Brave Bird, Iron Head, and Taunt, depending on the needs of the team. Brave Bird is a powerful Flying STAB that has the side effect of damaging Skarmory in the process. Unlike many Pokemon using recoil moves like BB, this can actually work in Skarmory's favor, especially if it is within range of dying from the recoil, as this will prevent the opponent from removing the hazards on that turn, allowing you to switch in something to counter the hazard remover. Iron Head is a useful Steel type STAB. It's primary purpose is to take out Mega Diancie, who would otherwise cause serious problems for Skarmory due to Magic Bounce. Taunt is fairly self-explanatory. It can be used on slower leads to prevent your opponent from setting up hazards, or with Custap's boost to screw over anything attempting to Defog. Any two of those three moves will work effectively. It comes down to what exactly you think you'll have the most problems with. Speed is maximized and given a positive nature for obvious reasons. Attack is maximized to ensure that Skarmory can do at least a moderate amount of damage with its attacking move(s). If Brave Bird is being used in order to commit suicide, then this also has the benefit of increasing the recoil Skarmory will take, making it easier for Skarm to accomplish this, as well as making it easier to get to Custap range. While not listed in the set since there are situations where you may want Skarm to be able to last a bit longer, it is often a good idea to zero out the IVs for Skarm's defensive stats, in order to help ensure that you actually reach Custap range, rather than having an attack deal 70% damage, thus screwing you over big time.
Good Teammates: Given this set's intended purpose is for providing hazards to pressure the opponent for very aggressive teams, pretty much anything common on such teams that can take advantage of this can make a pretty good teammate. Teammates that can prevent or deter hazard removal, such as Gengar and Bisharp, make excellent teammates for Skarmory, since you don't want your opponent removing your hazards. Offensive sweepers and wallbreakers who like having hazards up to ensure kills and to pressure the opponent, such as Mega Lopunny, Mega Metagross, Mega Gallade, Mega Gardevoir, Charizard X & Y, Lando, Keldeo, and countless other offensive team mainstays, will make great use of Skarmory's ability to get several layers of hazards up fairly reliably. If your team requires a hazard remover to be present, then a Rapid Spinner such as Starmie is preferable, since, again, you don't want your own hazards being removed. Something to handle priority users like Talonflame and Azumarill could be useful, as Skarm's a fairly predictable lead, so your opponent might lead with them to screw up Skarm's ability to stack hazards. Something that can take on Mega Sableye is important too, since it's the main relevant Magic Bouncer aside from Mega Diancie, and Skarmory can't do much of anything to it. Other than these considerations, Skarmory doesn't need a lot of support, since it is itself a support mon, and it is capable of supporting a fair amount of offensive teams.
What Counters It: Anything with priority moves will screw up Skarmory, since Custap does not increase the priority of its moves, it simply makes the move resolve before anything else in the same priority bracket. Talonflame is particularly dangerous, since it can use Flare Blitz to reduce Skarmory's HP to near zero, then use Brave Bird with priority the next turn when Custap activates, finishing it off. Hazard removers that can outspeed Skarmory (which is most of them) can be a real problem if you've already used up Custap Berry, as you won't be able to Taunt them. Anything with Magic Bounce is a big problem. While Skarmory can deal with Mega Diancie effectively as long as it's running Iron Head, Mega Sableye is a different story entirely. If your opponent leads with Mega Sableye, you're in trouble. Also, counterintuitive as it may sound, Pokemon using relatively weaker attacks can actually be the most effective against Skarmory, since (as mentioned above), Skarmory needs to hit Custap range in order to get the maximum benefit out of its set. Anything capable of dealing more than 50% but less than 75% with a single attack is a fairly effective counter to Skarmory.
Any Additional Info: One other possibility for this set is to run Salac Berry over Custap Berry. This can easily surprise your opponent since they'd most likely expect a Custap Berry set. This raises Skarm's speed for all moves by one stage for as long as it is out, which can actually give it freedom to set up even more hazards than it normally could in certain situations, or to turn the tables on something expecting to kill Skarm, including pretty much every relevant hazard remover. However, this idea is not without problems of its own. With a boost from Salac Berry, Skarmory hits a speed of 393, which is excellent, but still leaves it vulnerable to priority users, most scarfers, and a few high speed unboosted Pokemon such as MegaMan. Also, since Skarm will still have a very low HP by that point, its ability to carry the Salac Boost across several turns (which is the main point of the set) is unreliable at best. However, Salac Berry is still a viable alternative over Custap.