Bow down subjects, the new king of Ubers has arrived!
Xerneas @ Power Herb
Ability: Fairy Aura
EVs: 80 Spd / 252 SAtk / 176 HP
- Focus Blast/Hidden Power Fire
Beware the mighty deer of life, for although Yveltal is the destruction Pokemon, it can't match Xerneas's destructive power. The use of a power herb hastened Geomancy makes Xerneas outspeed everything that isn't a scarfed Deoxys and nigh impenetrable from the special side. Moonblast decimates all the legendary dragons, and the only common resistance to it is steel types, Arceus-Poison, and Ho-oh. Thunder and Thunderbolt remove Ho-oh, one of the few viable Xerneas checks, while Psyshock can handle poison types as well as any OP special walls like Blissey. HP Fire nails the likes of Genesect, Scizor, Aeglislash and Ferrothorn, who may cause, especially with Bullet Punch, and Focus Blast can hit heatran and all steel types bar Aegislash neutrally.
- +2 252+ SpA Xerneas Focus Blast vs. 252 HP / 4 SpD Blissey: 444-524 (62.1 - 73.3%) -- guaranteed 2HKO after Leftovers recovery
- +2 252+ SpA Xerneas Thunderbolt vs. 252 HP / 252+ SpD Ho-Oh: 230-272 (55.2 - 65.3%) -- guaranteed 2HKO after Leftovers recovery
- +2 252+ SpA Xerneas Hidden Power Fire vs. 252 HP / 4 SpD Aegislash-Shield: 204-240 (62.9 - 74%) -- guaranteed 2HKO after Leftovers recovery
Even the best Xerneas counters out there cannot avoid a 2HKO from this massive beast, and practically every that isn't excessively bulky or doesn't resist Moonblast is OHKO'd after a boost. Add on the fact that is can switch in and set up on nearly every dragon type bar Dialge and Xerneas is outright scary.
The one downside is that it only gets one chance to set up, but even if no set up opportunities arise, a Modest max invested fairy aura boosted Moonblast will still leave a dent in most things.
Good Teammates Steel types are nice for taking poison and steel hits, with Heatran being a notable mention for taking out other steel types with it's STAB Fire attacks. Groudon also works extremely well, as it can boost the power of HP Fire, counters Aegislash an Heatran, and can take out Ho-oh with Stone Edge. Terrakion is also a nice, more offensive partner, and can additionally take on the most common users of Extreme Speed, Arceus and Rayquaza, especially with it' great Scarf set.
Oh, you think the Chicken is the King of Speed? Bow before your true God, far older than any Helix
Arceus @ Silk Scarf
EVs: 200 HP / 252 Atk / 56 Spd
- Earthquake/Recover/Brick Break
- Shadow Force/Shadow Claw
- Swords Dance
Blaziken may have speed, but does Blaziken's speed go to the extreme? Nope. Extreme Killer Arceus is the terror of Ubers. After a Swords Dance Boost, Arceus can rip through all non-resisters or things lacking great deals of defensive investment easily with a STAB, +2 priority Extreme Speed. Pretty much only an handful of defensive steel types and Giratina can stand in it's way, as Scarfers and any faster offensive opponent can not handle Extremespeed. Ghost coverage is absolutely needed for Giratina, and you can choose between the power of Shadow Force or the instant gratification of Shadow Claw. Earthquake and Brick Break handle steel types, while Recover may be run if you want to extend Arceus's tremendous bulk even further.
- +2 252+ Atk Arceus Earthquake vs. 252 HP / 0 Def Aegislash-Shield: 318-376 (98.1 - 116%) -- 87.5% chance to OHKO
- +2 252+ Atk Arceus Shadow Claw vs. 252 HP / 0 Def Giratina: 272-320 (53.9 - 63.4%) -- guaranteed 2HKO after Leftovers recovery
- +2 252+ Atk Silk Scarf Arceus Extreme Speed vs. 0 HP / 0 Def Terrakion: 177-209 (54.7 - 64.7%) -- guaranteed 2HKO
All are 2HKOd. Even Scarf Terrakion, which fails to OHKO with Close Combat, falls to 2 extreme speeds.
Good Teammates Giratina and Giratina-O are great partners, as they can easily remove and or tank the hits of threats like Arceus Fighting and Terrakion, with Aegislash also being a fine option for additionally checking Xerneas, and all three can handle mega Gengar with a shadow sneak. Yveltal, Darkrai and Tyranitar have good abilities with removing ghosts. Yveltal gets special mention as it had access to priority STAB sucker punch and Ttar can trap ghosts with pursuit. Finally, any strong special attacker, like Mewtwo or Palkia, is nice for removing physical walls, and it is highly appreciated if they remove steel types with their fire coverage.