General: While Kyogre has been ruling Ubers for the past 2 generations, Generation 6 brings a complete and dominant threat. Xerneas, even by Ubers standards, is one of the best sweepers in the game. With a great ability and its signature move Geomancy, it hits nearly everything for massive damage after only using one turn of setup with the item Power Herb. Like with Kyogre in the previous generations, one must have a solid check to this monster on every team. Geomancy: Xerneas @ Power Herb EVs: 44 HP / 28 Def / 252 SpA / 184 Spe Modest Nature (+SAtk, -Atk) -Geomancy -Moonblast -Focus Blast / Hidden Power Fire -Thunder / Psyshock This is Xerneas' most dominant set. With Power Herb, Xerneas can bypass the two-turn setup that Geomancy requires and gain +2 in Special Attack, Special Defense, and Speed in only one turn. Moonblast is used for a strong STAB that is boosted further by Fairy Aura. Focus Blast is used to hit the Steel types that Moonblast cannot. Hidden Power Fire can be used as an alternative to hit Aegislash and Scizor. Psyshock can be used for Xerneas to power through Special Walls such as Chansey, and Arceus-Poison. Thunder can be used alternatively to hit tanks such as Ho-Oh. The EV spread is used to provide maximum power for Xerneas' attacks as well as allow it to outspeed the unboosted metagame. To every great threat, there is a weakness though. If switched/phazed back out after using Geomancy once, Xerneas is almost useless for the rest of the game. The key is playing smart. Choice Scarf: Xerneas @ Choice Scarf EVs: 4 Def / 252 SAtk / 252 Spe Timid Nature (+Spd, -Atk) -Moonblast -Focus Blast -Thunder / Thunderbolt -Psyshock Another role that Xerneas can take on is revenge killer. With good off-the-bat power from Moonblast (boosted by STAB and Fairy Aura), and three coverage moves to cover its weaknesses, Xerneas can serve as an effective revenge killer in the metagame. Although more easily stopped than the Geomancy set, Choice Scarf Xerneas does not have to worry about being useless after being switched out just once. Mixed: Xerneas @ Expert Belt / Life Orb Trait: Fairy Aura EVs: 196 Atk / 88 SAtk / 224 Spd Naive Nature (+Spd, -SDef) - Moonblast - Close Combat - Rock Slide - Aromatherapy One interesting set that Xerneas can take on is the Mixed set. This set is designed to bait in certain threats and remove them. Naive Nature along with 224 Speed EVs allow Xerneas to outspeed Base 95 Speed Pokemon. The attack EVs ensures that Rock Slide will be a OHKO on Max HP Ho-Oh. Moonblast is for a reliable STAB move that is powered up by Fairy Aura. Close Combat is used to nail the common Chansey/Blissey that like to switch in on Xerneas. Life Orb can be used as an alternative to Expert Belt, but it can be less effective as it takes away the surprise factor of not having Power Herb. Other Options: Although the three sets outlined above are really what makes Xerneas so dominant in the Ubers metagame, Xerneas can perform a variety of roles. On Stall teams, Xerneas can run a cleric set with Aromatherapy with Rest, Sleep Talk, and Moonblast (for reliable damage output). With great moves like Close Combat, Rock Slide, and Megahorn, that utilize Xerneas' Attack stat, it can run a pure Attacking set, although, it does lack a physical Fairy STAB move. Geomancy + Power Herb along with Substitute and Moonblast plus Thunder / Psyshock / Focus Blast can be a viable option to set up Substitute on Chansey/Blissey/Clefable. Checks and Counters: Because Xerneas is so versatile and threatening, it is very hard to counter. However, there are ways to do it. With Specially Defensive Clefable and its Unaware ability, it can effectively stall out Xerneas at +2. Specially Defensive Steel-type Pokemon such as Bronzong, Jirachi, Klefki and Heatran can also be used as solid checks to Xerneas, barring Hidden Power Fire for the first three and Focus Blast for Heatran. Chansey, who has always been known as a Specially Defensive beast, can take a few hits. However, Focus Blast or Psyshock will eventually wear it down. A Choice Band Scizor may also be used to check Xerneas with its super-effective Bullet Punch. Amoonguss can put a stop to variants lacking Psyshock. Choice Scarf Imposter Ditto can come in and revenge kill a boosted Xerneas and immediately pose as a threat to the rest of the team. Please give thoughts on this and how it can be improved (including grammar). Thanks!