Regirock @ Normal Gem  
Ability: Sturdy  
Tera Type: Ghost  
EVs: 252 Atk / 4 SpD / 252 Spe  
Hasty Nature  
- Stealth Rock  
- Explosion  
- Superpower  
- Stone Edge  

Regice @ Blunder Policy  
Ability: Clear Body  
Tera Type: Ice  
EVs: 4 Def / 252 SpA / 252 Spe  
Rash Nature  
IVs: 0 Atk  
- Blizzard  
- Ice Beam  
- Thunderbolt  
- Focus Blast  

Registeel @ Leftovers  
Ability: Clear Body  
Tera Type: Ghost  
EVs: 252 HP / 252 Def / 4 SpD  
Jolly Nature  
- Iron Defense  
- Body Press  
- Thunder Wave  
- Heavy Slam  

Regidrago @ Lum Berry  
Ability: Dragon's Maw  
Tera Type: Fairy  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Dance  
- Dragon Claw  
- Earthquake  
- Fire Fang  

Regigigas @ Choice Specs  
Ability: Slow Start  
Tera Type: Normal  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
- Hyper Beam  
- Tera Blast  
- Thunderbolt  
- Focus Blast  

Iron Hands @ Air Balloon  
Ability: Quark Drive  
Tera Type: Flying  
EVs: 252 Atk / 4 SpD / 252 Spe  
Hasty Nature  
- Belly Drum  
- Drain Punch  
- Ice Punch  
- Thunder Punch