[OU] Mega Gyarados + Lucario offense

Landorus-Therian @ Choice Scarf
Ability: Intimidate
EVs: 252 Atk / 24 Def / 232 Spe
Jolly Nature
- Earthquake
- Explosion
- Stone Edge
- U-turn

Garchomp @ Life Orb
Ability: Rough Skin
EVs: 16 Atk / 244 SpA / 248 Spe
Naughty Nature
- Stealth Rock
- Earthquake
- Fire Blast
- Draco Meteor

Gyarados-Mega @ Gyaradosite
Ability: Mold Breaker
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Dragon Dance
- Waterfall
- Crunch
- Substitute

Klefki @ Leftovers
Ability: Prankster
EVs: 252 HP / 56 Def / 200 SpD
Calm Nature
IVs: 0 Atk
- Spikes
- Flash Cannon
- Thunder Wave
- Heal Block

Latios @ Life Orb
Ability: Levitate
EVs: 32 HP / 224 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Draco Meteor
- Psyshock
- Calm Mind
- Roost

Lucario @ Life Orb
Ability: Justified
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
IVs: 29 HP
- Swords Dance
- Close Combat
- Extreme Speed
- Iron Tail