Excadrill @ Groundium Z  
Ability: Sand Rush  
Level: 50  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
IVs: 0 SpA  
- Earthquake  
- Swords Dance  
- Iron Head  
- Protect

Unown
Options:
- offensive: Rock Slide, High Horsepower
- items: Focus Sash, Steelium Z

Unown
Offensive calcs:
- -1 252+ Atk Excadrill Iron Head vs. 4 HP / 0 Def Mega Ninetales-Alola: 184-220 (123.4 - 147.6%) -- guaranteed OHKO
- -1 252+ Atk Excadrill Tectonic Rage (180 BP) vs. 236 HP / 4 Def Incineroar: 252-296 (126 - 148%) -- guaranteed OHKO
- 252+ Atk Excadrill Tectonic Rage (180 BP) vs. 4 HP / 4 Def Kartana: 136-162 (100.7 - 120%) -- guaranteed OHKO
- 252+ Atk Excadrill Tectonic Rage (180 BP) vs. 252 HP / 0 Def Aegislash-Shield: 260-308 (155.6 - 184.4%) -- guaranteed OHKO

Unown
Useful partners:
- Sand / Desert Gale setter: Tyranitar, (Mega) Gigalith, Mega Flygon
- others: Mega Hawlucha, Mega Salamence