Allistair UBer

Smeargle @ Focus Sash
Ability: Own Tempo
EVs: 252 HP / 4 Atk / 252 Spe
Jolly Nature
- Stealth Rock
- Sticky Web
- Taunt
- Nuzzle

Arceus-Ground @ Earth Plate
Ability: Multitype
EVs: 252 Atk / 252 Spe
Adamant Nature
- Swords Dance
- Stone Edge
- Earthquake
- Recover

Rayquaza @ Sky Plate
Ability: Air Lock
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Swords Dance
- Dragon Ascent
- Extreme Speed
- Aqua Tail

Mewtwo @ Life Orb
Ability: Pressure
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Fire Blast
- Psystrike
- Ice Beam
- Taunt

Diancie-Mega @ Diancite
Ability: Magic Bounce
EVs: 252 Atk / 252 Spe
Lonely Nature
- Explosion
- Stealth Rock
- Earth Power
- Moonblast

Xerneas @ Leftovers
Ability: Fairy Aura
EVs: 252 HP / 222 Spe
Bold Nature
IVs: 0 Atk
- Moonblast
- Psyshock
- Thunder Wave
- Rest