Magearna @ Custap Berry  
Ability: Soul-Heart  
EVs: 252 HP / 64 Def / 136 SpA / 8 SpD / 48 Spe  
Modest Nature  
IVs: 0 Atk  
- Calm Mind  
- Fleur Cannon  
- Thunderbolt  
- Focus Blast  

Haxorus @ Groundium Z  
Ability: Mold Breaker  
EVs: 220 Atk / 48 SpD / 240 Spe  
Adamant Nature  
- Earthquake  
- Swords Dance  
- Taunt  
- Dragon Claw  

Gyarados @ Gyaradosite  
Ability: Intimidate  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Crunch  
- Earthquake  
- Taunt  

Landorus-Therian (M) @ Yache Berry  
Ability: Intimidate  
EVs: 248 HP / 8 Atk / 252 Spe  
Jolly Nature  
- Stealth Rock  
- Earthquake  
- U-turn  
- Imprison  

Serperior (M) @ Rocky Helmet  
Ability: Contrary  
EVs: 208 HP / 48 Def / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Taunt  
- Leaf Storm  
- Glare  
- Defog  

Volcarona @ Leftovers  
Ability: Flame Body  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Quiver Dance  
- Flamethrower  
- Bug Buzz  
- Hidden Power [Ground]