Cloyster @ Focus Sash  
Ability: Skill Link  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Icicle Spear  
- Toxic Spikes  
- Rapid Spin  
- Shell Smash  

Mew @ Mental Herb  
Ability: Synchronize  
EVs: 248 HP / 8 SpD / 252 Spe  
Jolly Nature  
- Explosion  
- Stealth Rock  
- Taunt  
- Thunder Wave  

Gyarados-Mega @ Gyaradosite  
Ability: Mold Breaker  
EVs: 24 HP / 252 Atk / 232 Spe  
Adamant Nature  
- Waterfall  
- Crunch  
- Dragon Dance  
- Taunt  

Serperior @ Light Clay  
Ability: Contrary  
EVs: 200 HP / 44 Def / 8 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Leaf Storm  
- Taunt  
- Reflect  
- Light Screen  

Volcarona @ Sitrus Berry  
Ability: Flame Body  
EVs: 28 HP / 44 Def / 252 SpA / 184 Spe  
Timid Nature  
IVs: 0 Atk  
- Flamethrower  
- Bug Buzz  
- Giga Drain  
- Quiver Dance  

Thundurus-Therian (M) @ Leftovers  
Ability: Volt Absorb  
EVs: 24 HP / 20 Def / 172 SpA / 40 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk / 30 Def  
- Thunderbolt  
- Hidden Power [Ice]  
- Focus Blast  
- Nasty Plot