Diancie-Mega @ Diancite  
Ability: Magic Bounce  
Tera Type: Rock  
EVs: 4 Atk / 252 SpA / 252 Spe  
Naive Nature  
- Moonblast  
- Diamond Storm  
- Earth Power  
- Mystical Fire  

Cradily @ Leftovers  
Ability: Storm Drain  
Tera Type: Rock  
EVs: 252 HP / 4 Atk / 252 Def  
Impish Nature  
IVs: 0 Atk  
- Giga Drain  
- Stealth Rock  
- Recover  
- Leech Seed  

Tyranitar @ Choice Band  
Ability: Sand Stream  
Tera Type: Rock  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Ice Punch / Pursuit  
- Stone Edge  
- Earthquake / Pursuit  
- Crunch  

Garganacl @ Heavy-Duty Boots / Leftovers  
Ability: Purifying Salt  
Tera Type: Rock  
EVs: 252 HP / 4 Atk / 252 SpD  
Careful Nature  
- Iron Defense  
- Body Press  
- Salt Cure  
- Recover  
Nihilego @ Choice Scarf  
Ability: Beast Boost  
Tera Type: Rock  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Sludge Wave  
- Thunderbolt  
- Hidden Power [Ice]  
- Grass Knot

Coalossal @ Heavy-Duty Boots / Air Balloon  
Ability: Flame Body  
Tera Type: Rock  
EVs: 248 HP / 8 Atk / 252 Def  
Relaxed Nature  
- Rapid Spin  
- Will-O-Wisp  
- Flamethrower  
- Rock Tomb