This is Offense

Charizard-Mega-Y @ Charizardite Y
Ability: Drought
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Fire Blast
- Solar Beam
- Roost
- Dragon Pulse

Celesteela @ Life Orb
Ability: Beast Boost
EVs: 84 HP / 252 SpA / 172 Spe
Rash Nature
- Flamethrower
- Earthquake
- Air Slash
- Autotomize

Garchomp @ Choice Scarf
Ability: Sand Veil
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- Dragon Claw
- Outrage
- Rock Slide

Pheromosa @ Fightinium Z
Ability: Beast Boost
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Rapid Spin
- Bug Buzz
- Focus Blast
- Ice Beam

Greninja @ Life Orb
Ability: Protean
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Gunk Shot
- Hydro Pump
- Extrasensory
- Ice Beam

Landorus-Therian @ Rocky Helmet
Ability: Intimidate
EVs: 248 HP / 236 Def / 24 SpD
Relaxed Nature
- Stealth Rock
- Earthquake
- Hidden Power [Ice]
- U-turn