Excadrill @ Steelium Z  
Ability: Sand Rush  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Swords Dance  
- Earthquake  
- Iron Head  
- Rapid Spin  

Tyranitar-Mega @ Tyranitarite  
Ability: Sand Stream  
EVs: 168 HP / 252 Atk / 88 Spe  
Adamant Nature  
- Stone Edge  
- Pursuit  
- Earthquake / Fire Punch / Ice Punch
- Stealth Rock

OR

Tyranitar @ Assault Vest
Ability: Sand Stream
EVs: 224 HP / 32 Atk / 252 SpD
Careful Nature
- Rock Slide
- Crunch
- Pursuit
- Earthquake