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

Arceus-Rock @ Stone Plate  
Ability: Multitype  
Tera Type: Rock  
EVs: 248 HP / 252 Def / 8 Spe  
Bold Nature  
IVs: 0 Atk  
- Judgment  
- Calm Mind  
- Recover  
- Ice Beam  

Nihilego @ Life Orb  
Ability: Beast Boost  
Tera Type: Rock  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Sludge Bomb  
- Thunderbolt  
- Dazzling Gleam  
- Clear Smog  

Tyranitar @ Smooth Rock  
Ability: Sand Stream  
Tera Type: Rock  
EVs: 252 HP / 16 Def / 240 SpD  
Sassy Nature  
- Aqua Tail  
- Avalanche  
- Knock Off  
- Dragon Tail  

Ogerpon-Cornerstone (F) @ Cornerstone Mask  
Ability: Sturdy  
Tera Type: Rock  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Horn Leech  
- Knock Off  
- Play Rough  
- Taunt  

Iron Boulder @ Booster Energy  
Ability: Quark Drive  
Tera Type: Rock  
EVs: 192 HP / 252 Atk / 64 Spe  
Jolly Nature  
- Swords Dance  
- Mighty Cleave  
- Zen Headbutt  
- Close Combat