Ubers: X&Y

Xerneas @ Power Herb
Ability: Fairy Aura
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Geomancy
- Moonblast
- Close Combat
- Focus Blast

Arceus-Electric (Arceus) @ Life Orb
Ability: Multitype
EVs: 248 HP / 252 Atk / 8 SpA
Lonely Nature
- Earthquake
- Recover
- Swords Dance
- Extreme Speed

Palkia @ Choice Specs
Ability: Pressure
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Spacial Rend
- Earth Power
- Hydro Pump
- Focus Blast

Gengar-Mega @ Gengarite
Ability: Shadow Tag
EVs: 248 HP / 8 SpA / 252 Spe
Timid Nature
- Shadow Ball
- Perish Song
- Protect
- Disable

Giratina-Origin @ Griseous Orb
Ability: Levitate
EVs: 200 HP / 108 Atk / 100 Def / 100 SpD
Adamant Nature
- Shadow Force
- Rest
- Defog
- Dragon Tail

Darkrai @ Focus Sash
Ability: Bad Dreams
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Dark Pulse
- Dark Void
- Nasty Plot
- Sludge Bomb