Cloyster @ Normal Gem  
Ability: Skill Link  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Shell Smash  
- Explosion  
- Icicle Spear  
- Toxic Spikes  

Kommo-o @ Groundium Z  
Ability: Bulletproof  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Close Combat  
- Earthquake  
- Ice Punch  

Charizard-Mega-X @ Charizardite X  
Ability: Tough Claws  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Flare Blitz  
- Earthquake  
- Dragon Claw  

Mew @ Mental Herb  
Ability: Synchronize  
EVs: 248 HP / 44 Def / 216 Spe  
Timid Nature  
IVs: 0 Atk  
- Stealth Rock  
- Taunt  
- Thunder Wave  
- Ice Beam  

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

Magearna @ Iapapa Berry  
Ability: Soul-Heart  
EVs: 248 HP / 72 Def / 176 SpA / 8 SpD / 4 Spe  
Modest Nature  
IVs: 0 Atk  
- Fleur Cannon  
- Thunderbolt  
- Focus Blast  
- Calm Mind