Registeel @ Power Herb  
Ability: Clear Body  
EVs: 4 HP / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Atk  
- Flash Cannon  
- Meteor Beam  
- Thunderbolt  
- Steel Beam  

Regirock @ Choice Band  
Ability: Sturdy  
EVs: 252 HP / 252 Atk / 4 SpD  
Relaxed Nature  
- Stone Edge  
- Rock Slide  
- Fire Punch  
- Earthquake  

Regice @ Leftovers  
Ability: Clear Body  
EVs: 4 HP / 252 SpA / 252 Spe  
Modest Nature  
- Icicle Spear  
- Power-Up Punch  
- Rock Polish  
- Substitute  

Regidrago @ Choice Scarf  
Ability: Dragon's Maw  
EVs: 252 Atk / 252 SpA  
Brave Nature  
- Dragon Energy  
- Draco Meteor  
- Dragon Pulse  
- Explosion  

Regieleki @ Leftovers  
Ability: Transistor  
EVs: 252 HP / 128 Def / 128 SpD  
Relaxed Nature  
- Thunder Cage  
- Extreme Speed  
- Thunder Wave  
- Substitute  

Regigigas @ Leftovers  
Ability: Slow Start  
EVs: 108 HP / 148 Atk / 252 Spe  
Adamant Nature  
IVs: 0 Atk  
- Earth Power  
- Thunderbolt  
- Nature Power
- Rock Polish