Empoleon @ Shuca Berry  
Ability: Torrent  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Scald  
- Rinse Off
- Ice Beam  
- Stealth Rock

Empoleon @ Life Orb
Ability: Torrent   
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Hydro Pump  
- Flash Cannon  
- Ice Beam  
- Agility

Other Options: Defog, Physically Defensive EV Spread, Grass Knot and Hidden Power [Fire] on the Agility set