Specs (Keldeo) @ Choice Specs  
Ability: Justified  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Surf  
- Hydro Pump  
- Secret Sword  
- Icy wind / Hidden Power [Fire]

Reflect Attacker (Keldeo-Resolute) @ Water Gem  
Ability: Justified  
EVs: 224 HP / 72 SpA / 4 SpD / 208 Spe  
Timid Nature  
IVs: 0 Atk  
- Reflect  
- Icy Wind  
- Hydro Pump  
- Secret Sword

Scarf (Keldeo) @ Choice Scarf  
Ability: Justified  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid / Modest Nature 
IVs: 0 Atk  
- Hydro Pump  
- Secret Sword  
- Icy Wind  
- Scald