Onix @ Berry Juice  
Ability: Sturdy  
Level: 5  
EVs: 76 HP / 236 Atk / 196 Spe  
Jolly Nature  
- Stealth Rock  
- Rock Blast  
- Precipice Blades  
- Taunt / Spikes
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Optional Move(s):
- Endure  
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Onix @ Eviolite  
Ability: Weak Armor  
Level: 5  
EVs: 76 HP / 236 Atk / 196 Spe  
Jolly Nature  
- Stealth Rock  
- Rock Blast  
- Precipice Blades  
- Explosion / Protect / Shore Up
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Optional Move(s):
- Spikes
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Overview:
Onix is one of the premier leads thanks to a good speed, access to two entry hazards and Taunt. With Sturdy and Berry Juice, it is able to guaranteed set-up at least two hazards before it goes down. Thanks to its titanic Defense, Onix is capable to running Eviolite sets with Weak Armor, which further boosted its already high Defense and act as a greater switch-in to threats like Archen, Ponyta and physical Vullaby. However, a low special bulk leaves it vulnerable to special attackers and has poor defensive typing, which include a crippling weakness to Water, Grass, Ground and Fighting.