PyritPrankster

Garchomp @ Life Orb
Ability: Rough Skin
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Dragon Claw
- Earthquake
- Fire Fang

Tapu Koko @ Choice Specs
Ability: Electric Surge
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk / 30 SpA / 30 Spe
- Volt Switch
- Dazzling Gleam
- Grass Knot
- Hidden Power [Fire]

Marowak-Alola @ Choice Scarf
Ability: Rock Head
Shiny: Yes
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Flare Blitz
- Shadow Bone
- Earthquake
- Double-Edge

Celesteela @ Weakness Policy
Ability: Beast Boost
EVs: 128 Def / 4 SpA / 124 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Autotomize
- Air Slash
- Flamethrower
- Giga Drain

Gyarados-Mega @ Gyaradosite
Ability: Intimidate
EVs: 88 HP / 220 Atk / 4 Def / 196 Spe
Jolly Nature
- Dragon Dance
- Substitute
- Waterfall
- Crunch

Pheromosa @ Focus Sash
Ability: Beast Boost
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
- U-turn
- Rapid Spin
- High Jump Kick
- Ice Beam