Onix @ Eviolite  
Ability: Weak Armor  
Level: 5  
EVs: 236 Atk / 76 SpD / 196 Spe  
- Stealth Rock  
- Earthquake  
- Rock Blast  
- Explosion / Body Press / Taunt / Spikes

Onix @ Eviolite  
Ability: Rock Head  
Level: 5  
EVs: 236 Atk / 76 SpD / 196 Spe  
Jolly Nature  
- Head Smash  
- Earthquake  
- Stealth Rock / Body Press / Explosion  
- Dragon Dance

Onix @ Berry Juice  
Ability: Sturdy  
Level: 5  
EVs: 76 HP / 236 Atk / 196 Spe  
Jolly Nature  
- Stealth Rock  
- Earthquake  
- Rock Blast  
- Taunt / Spikes / Explosion