Registeel @ Custap Berry  
Ability: Clear Body  
Tera Type: Steel  
EVs: 252 HP / 244 Def / 12 Spe  
Bold Nature  
IVs: 0 Atk  
- Iron Defense  
- Endure  
- Body Press  
- Rest  

Diancie @ Weakness Policy  
Ability: Clear Body  
Tera Type: Rock  
EVs: 248 HP / 76 Atk / 184 Def  
Relaxed Nature  
- Diamond Storm  
- Moonblast  
- Psychic  
- Trick Room  

Gouging Fire @ Life Orb  
Ability: Protosynthesis  
Tera Type: Fire  
EVs: 128 HP / 252 SpA / 128 Spe  
Modest Nature  
IVs: 0 Atk / 3 Def  
- Sunny Day  
- Overheat  
- Draco Meteor  
- Burning Bulwark