Great Tusk @ Choice Band  
Ability: Protosynthesis  
Tera Type: Ground  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Earthquake  
- Close Combat  
- Heavy Slam  
- Head Smash  

Volcanion @ Air Balloon  
Ability: Water Absorb  
Tera Type: Fire  
EVs: 252 HP / 188 Def / 56 SpA / 12 Spe  
Modest Nature  
- Overheat  
- Steam Eruption  
- Sludge Bomb  
- Flame Charge  

Diancie @ Weakness Policy  
Ability: Clear Body  
Tera Type: Rock  
EVs: 252 HP / 108 Def / 148 SpD  
Sassy Nature  
IVs: 0 Spe  
- Diamond Storm  
- Moonblast  
- Trick Room  
- Encore