Clawitzer (Hydreigon) @ Choice Specs  
Ability: Mega Launcher  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Dark Pulse  
- Dragon Pulse  
- Flash Cannon / Sludge Bomb
- U-turn  

Kommo-o (Hydreigon) @ Throat Spray  
Ability: Soundproof  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Clangorous Soul  
- Clanging Scales  
- Aura Sphere  
- Flash Cannon  

Steelix (Hydreigon) @ Life Orb  
Ability: Sheer Force  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Dragon Breath  
- Dark Pulse  
- Flash Cannon  
- Taunt / Stealth Rock 

Sigilyph (Hydreigon) @ Choice Specs  
Ability: Tinted Lens  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Dark Pulse  
- Flash Cannon / Psychic 
- Dazzling Gleam  
- Trick  

Thievul (Hydreigon) @ Grassy Seed  
Ability: Unburden  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Nasty Plot  
- Dark Pulse  
- Burning Jealousy  
- Taunt  

Weezing-Galar (Hydreigon) @ Leftovers  
Ability: Neutralizing Gas  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Dark Pulse  
- Sludge Bomb / Fire Blast 
- Taunt / Substitute

Thievul (Hydreigon) @ Choice Specs  
Ability: Stakeout  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
- Dark Pulse  
- U-turn  
- Burning Jealousy  
- Knock Off