Tapu Koko @ Choice Specs  
Ability: Electric Surge  
EVs: 4 HP / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Thunderbolt  
- Volt Switch  
- Dazzling Gleam  
- Hidden Power [Fire]  

Hawlucha @ Electric Seed  
Ability: Unburden  
EVs: 32 HP / 252 Atk / 172 SpD / 52 Spe  
Adamant Nature  
- High Jump Kick  
- Acrobatics  
- Swords Dance  
- Substitute  

Magearna @ Electrium Z  
Ability: Soul-Heart  
EVs: 4 HP / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Focus Blast  
- Ice Beam  
- Thunderbolt  
- Shift Gear  

Landorus-Therian (M) @ Rocky Helmet  
Ability: Intimidate  
EVs: 252 HP / 232 Def / 24 Spe  
Relaxed Nature  
- Earthquake  
- U-turn  
- Hidden Power [Fire]  
- Stealth Rock  

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

Serperior @ Rocky Helmet  
Ability: Contrary  
EVs: 112 HP / 144 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Leaf Storm  
- Glare  
- Taunt  
- Defog