Marshadow of the Collusus

Marshadow @ Assault Vest
Ability: Technician
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Spectral Thief
- Close Combat
- Shadow Sneak
- Thunder Punch

Tapu Koko @ Magnet
Ability: Electric Surge
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Thunderbolt
- U-turn
- Dazzling Gleam
- Taunt

Garchomp @ Choice Scarf
Ability: Rough Skin
EVs: 252 Atk / 4 SpA / 252 Spe
Naive Nature
- Earthquake
- Dragon Claw
- Fire Blast
- Stealth Rock

Tangrowth @ Assault Vest
Ability: Regenerator
EVs: 4 SpA / 252 SpD
Serious Nature
- Giga Drain
- Knock Off
- Hidden Power [Fire]
- Poison Jab

Gyarados-Mega @ Gyaradosite
Ability: Moxie
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Waterfall
- Crunch
- Earthquake
- Dragon Dance

Forretress @ Leftovers
Ability: Sturdy
EVs: 252 HP / 4 Atk / 252 Def
Relaxed Nature
IVs: 0 Spe
- Rapid Spin
- Gyro Ball
- Spikes
- Volt Switch