Amoonguss @ Sitrus Berry  
Ability: Regenerator  
EVs: 252 HP / 68 Def / 188 SpD  
Calm Nature  
IVs: 0 Atk / 19 Spe  
- Spore  
- Rage Powder  
- Pollen Puff  
- Clear Smog  

Diancie @ Safety Goggles  
Ability: Clear Body  
EVs: 252 HP / 212 Atk / 44 Def  
Sassy Nature  
IVs: 0 Spe  
- Diamond Storm  
- Body Press  
- Trick Room  
- Protect  

Porygon2 @ Eviolite  
Ability: Download  
EVs: 252 HP / 40 Def / 28 SpA / 188 SpD  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Ice Beam  
- Thunderbolt  
- Trick Room  
- Recover  

Indeedee-F (F) @ Eject Button  
Ability: Psychic Surge  
EVs: 252 HP / 204 Def / 52 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Follow Me  
- Helping Hand  
- Expanding Force  
- Heal Pulse  

Volcanion @ Shuca Berry  
Ability: Water Absorb  
EVs: 248 HP / 252 SpA / 8 SpD  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Steam Eruption  
- Heat Wave  
- Earth Power  
- Protect  

Necrozma @ Power Herb  
Ability: Prism Armor  
EVs: 252 HP / 252 SpA / 4 SpD  
Modest Nature  
IVs: 0 Atk  
- Expanding Force  
- Meteor Beam  
- Earth Power  
- Trick Room