Gengar @ Lum Berry  
Ability: Levitate  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Encore  
- Spore  
- Water Spout / Eruption 
- Spikes / Rapid Spin / Baton Pass / ... 

Gengar @ Leftovers  
Ability: Levitate  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naive Nature  
- Spore   
- Imprison  
- Shadow Ball / Hidden Power [Ghost] 
- Water Spout / Eruption / Surf