Gengar @ Spell Tag / Life Orb / Black Sludge  
Ability: Cursed Body  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Moongeist Beam  
- Sludge Wave  
- Focus Blast  
- Nasty Plot  

Gengar @ Choice Specs  
Ability: Cursed Body  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Moongeist Beam  
- Sludge Wave  
- Focus Blast  
- Trick