Houndoom @ Darkinium Z  
Ability: Unnerve  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Fire Blast  
- Dark Pulse  
- Substitute / Will-O-Wisp / Flame Charge / Sucker Punch

Houndoom @ Firium Z  
Ability: Unnerve  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Fire Blast  
- Dark Pulse  
- Substitute / Will-O-Wisp / Flame Charge / Sucker Punch

Houndoom @ Choice Specs  
Ability: Unnerve  
EVs: 4 Atk / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Fire Blast  
- Dark Pulse  
- Hidden Power [Grass]  / Hidden Power [Fighting]
- Flamethrower / Overheat

Houndoom @ Firium Z  
Ability: Unnerve  
EVs: 4 Atk / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Sunny Day  
- Fire Blast  
- Dark Pulse  
- Solar Beam

Houndoom @ Choice Scarf
Ability: Unnerve  
EVs: 4 Atk / 252 SpA / 252 Spe  
Hasty Nature  
IVs: 30 Atk  
- Fire Blast  
- Dark Pulse  
- Hidden Power [Grass]  
- Pursuit