Balance Ubers

Dialga @ Leftovers
Trait: Pressure
EVs: 252 HP / 56 SAtk / 200 SDef
Modest Nature (+SAtk, -Atk)
- Stealth Rock
- Draco Meteor
- Thunder
- Roar

Kyogre @ Choice Specs
Trait: Drizzle
EVs: 252 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)
- Water Spout
- Surf
- Thunder
- Ice Beam

Giratina-O @ Griseous Orb
Trait: Levitate
EVs: 248 Atk / 248 SAtk / 12 Spd
Naughty Nature (+Atk, -SDef)
- Draco Meteor
- Will-O-Wisp
- Shadow Sneak
- Dragon Tail

Thundurus (M) @ Life Orb
Trait: Prankster
EVs: 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Thunder
- Thunder Wave
- Hidden Power [Ice]
- Taunt

Mewtwo @ Life Orb
Trait: Pressure
EVs: 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Aura Sphere
- Ice Beam
- Psystrike
- Thunder

Arceus-Steel @ Iron Plate
Trait: Multitype
EVs: 252 Atk / 4 SDef / 252 Spd
Adamant Nature (+Atk, -SAtk)
- Swords Dance
- ExtremeSpeed
- Iron Head
- Earthquake