Gengar @ Choice Scarf 
Ability: Cursed Body  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature / Modest Nature
IVs: 0 Atk  
- Moongeist Beam  
- Focus Blast  
- Sludge Wave  
- Trick / Will-O-Wisp / Destiny Bond