Steelix @ Life Orb  
Ability: Sheer Force  
EVs: 252 Atk / 252 SpA / 4 SpD  
Mild Nature  
IVs: 0 Spe  
- Earth Power  
- Flash Cannon  
- Ancient Power  
- Explosion  

Diancie @ Focus Sash  
Ability: Clear Body  
EVs: 248 HP / 252 Atk / 8 SpD  
Lonely Nature  
IVs: 0 Spe  
- Trick Room  
- Stealth Rock  
- Explosion  
- Diamond Storm  

Slowbro @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 252 HP / 252 Def  
Careful Nature  
IVs: 0 Atk / 0 Spe  
- Trick Room  
- Teleport  
- Slack Off  
- Scald  

Porygon2 @ Eviolite  
Ability: Trace  
EVs: 252 HP / 200 Def / 56 SpD  
Impish Nature  
IVs: 0 Atk / 0 Spe  
- Trick Room  
- Teleport  
- Recover  
- Tri Attack  

Stakataka @ Power Herb  
Ability: Beast Boost  
EVs: 252 HP / 252 SpA / 4 SpD  
Mild Nature  
IVs: 0 Atk / 0 Spe  
- Meteor Beam  
- Flash Cannon  
- Steel Beam  
- Trick Room  

Crawdaunt @ Choice Specs  
Ability: Adaptability  
EVs: 252 HP / 252 SpA / 4 SpD  
Modest Nature  
IVs: 0 Atk / 0 Spe  
- Hydro Pump  
- Dark Pulse  
- Ice Beam  
- Sludge Wave