Crustle @ Focus Sash  
Ability: Weak Armor  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Spikes  
- Stealth Rock  
- Rock Blast  
- Knock Off / X-Scissor / Earthquake

Crustle @ White Herb  
Ability: Sturdy  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- X-Scissor  
- Stone Edge / Rock Blast
- Shell Smash  
- Earthquake  

Additional Item Options: Rockium Z, Life Orb, Mental Herb, Buginium Z
Notes: Crustle has access to Shell Smash, which allows it to act as a threatening sweeper. It also has the options to set up both Stealth Rock and Spikes while keeping an offensive presence, giving it a solid role as a suicide hazard setter.