Gyarados @ Flyinium Z  
Ability: Moxie  
EVs: 48 HP / 248 Atk / 212 Spe  
Jolly Nature  
- Dragon Dance  
- Taunt  
- Waterfall  
- Bounce  

Charizard-Mega-X @ Charizardite X  
Ability: Blaze  
EVs: 32 HP / 252 Atk / 224 Spe  
Jolly Nature  
- Substitute  
- Swords Dance  
- Dragon Claw  
- Flame Charge  

Magearna @ Iapapa Berry  
Ability: Soul-Heart  
EVs: 248 HP / 72 Def / 136 SpA / 52 Spe  
Modest Nature  
IVs: 0 Atk  
- Calm Mind  
- Fleur Cannon  
- Focus Blast  
- Thunderbolt  

Tapu Koko @ Light Clay  
Ability: Electric Surge  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Reflect  
- Light Screen  
- Wild Charge  
- U-turn  

Landorus-Therian @ Yache Berry  
Ability: Intimidate  
EVs: 248 HP / 176 Def / 76 SpD / 8 Spe  
Impish Nature  
- Defog  
- Stealth Rock  
- Earthquake  
- Hidden Power [Ice]  

Serperior @ Leftovers  
Ability: Contrary  
EVs: 56 HP / 200 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Leech Seed  
- Leaf Storm  
- Hidden Power [Fire]