The team

Gigalith @ Weakness Policy
Ability: Sand Stream
Level: 50
EVs: 252 HP / 188 Atk / 68 Def
Brave Nature
IVs: 0 Spe
- Heavy Slam
- Rock Slide
- Wide Guard
- Protect

Marowak-Alola @ Thick Club
Ability: Lightning Rod
Level: 50
EVs: 252 HP / 188 Atk / 68 SpD
Brave Nature
- Shadow Bone
- Protect
- Bonemerang
- Flare Blitz

Metagross @ Choice Band
Ability: Clear Body
Level: 50
EVs: 252 HP / 252 Atk / 4 SpD
Brave Nature
IVs: 0 Spe
- Meteor Mash
- Zen Headbutt
- Hammer Arm
- Bullet Punch

Tapu Bulu @ Grassium Z
Ability: Grassy Surge
Level: 50
EVs: 252 HP / 252 Atk / 4 Spe
Adamant Nature
- Wood Hammer
- Horn Leech
- Stone Edge
- Protect

Milotic @ Leftovers
Ability: Competitive
Level: 50
EVs: 252 HP / 180 Def / 76 SpD
Bold Nature
IVs: 0 Atk
- Scald
- Hydro Pump
- Ice Beam
- Recover

Porygon2 @ Eviolite
Ability: Download
Level: 50
EVs: 252 HP / 156 Def / 36 SpA / 60 SpD
Quiet Nature
IVs: 0 Atk / 0 Spe
- Ice Beam
- Shadow Ball
- Recover
- Trick Room