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

Greninja @ Waterium Z  
Ability: Protean  
EVs: 4 Atk / 252 SpA / 252 Spe  
Naive Nature  
- Spikes  
- Hydro Pump  
- Gunk Shot  
- Hidden Power [Fire]