Choice Scarf (Gastly) @ Choice Scarf  
Ability: Levitate  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shadow Ball  
- Sludge Bomb  
- Trick  
- Destiny Bond  

Substitute (Gastly) @ Black Sludge / Life Orb
Ability: Levitate  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Shadow Ball  
- Sludge Bomb  
- Pain Split / Will-O-Wisp / Taunt

Choice Specs (Gastly) @ Choice Specs  
Ability: Levitate  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 3 Atk / 30 Def / 30 SpA / 30 SpD / 30 Spe  
- Shadow Ball  
- Sludge Bomb  
- Trick  
- Hidden Power [Fighting]