Hydreigon @ Leftovers  
Ability: Magic Bounce  
EVs: 252 HP / 224 SpD / 32 Spe  
Calm Nature  
- Dark Pulse  
- U-turn / Earth Power  
- Roost  
- Defog

Hydreigon @ Life Orb  
Ability: Galvanize  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Hyper Voice  
- Dark Pulse  
- Roost

Hydreigon @ Life Orb  
Ability: Dragon's Maw  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Draco Meteor  
- Flash Cannon / Shock Wave / Dark Pulse  
- Roost

Hydreigon @ Life Orb  
Ability: Sheer Force  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Dark Pulse  
- Flash Cannon  
- Roost

Hydreigon @ Choice Scarf  
Ability: Queenly Majesty  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Draco Meteor  
- U-turn  
- Flash Cannon  
- Roost / Defog / Fire Blast