Off we go

Charizard-Mega-X @ Charizardite X
Ability: Tough Claws
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Dragon Dance
- Dragon Claw
- Flare Blitz
- Earthquake

Tyrantrum @ Lum Berry
Ability: Rock Head
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Dragon Dance
- Dragon Claw
- Earthquake
- Iron Head

Dragonite @ Weakness Policy
Ability: Multiscale
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Dragon Dance
- Dragon Claw
- Earthquake
- Extreme Speed

Garchomp @ Lum Berry
Ability: Sand Veil
EVs: 252 Atk / 4 SpA / 252 Spe
Naive Nature
- Swords Dance
- Earthquake
- Outrage
- Fire Blast

Latios @ Life Orb
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Dragon Pulse
- Defog
- Psyshock
- Shadow Ball

Dragalge @ Choice Specs
Ability: Adaptability
EVs: 248 HP / 252 SpA / 8 SpD
Modest Nature
- Draco Meteor
- Sludge Bomb
- Thunderbolt
- Shadow Ball