Flygon @ Flygonite  
Ability: Levitate  
Level: 50  
EVs: 252 Atk / 4 SpD / 252 Spe  
Hasty Nature  
- Boomburst  
- Tailwind  
- Double-Edge  
- Protect

Unown
Move options:
- offensive: Extreme Speed, Stone Edge
- supportive: Feint, U-Turn

Unown
Offensive calcs:
- 252 Atk Mega Flygon Double-Edge vs. 4 HP / 0 Def Tapu Lele in Desert Gale: 156-184 (106.8 - 126%) -- guaranteed OHKO
- 0 SpA Mega Flygon Boomburst vs. 68 HP / 252 SpD Assault Vest Kartana in Desert Gale: 72-85 (50.3 - 59.4%) -- guaranteed 2HKO
Defensive calcs:
- 252 SpA Fairy Aura Mega Meowstic-F Dazzling Gleam vs. 0 HP / 4 SpD Mega Flygon: 132-156 (85.1 - 100.6%) -- 6.3% chance to OHKO

Unown
Useful partners:
- Sand abuser: Excadrill, Dracozolt, Dracovish, Lycanroc-Midday
- Pokémon resistant or immune to Ground type Boomburst: Galarian Zapdos, Rillaboom, Rotom-Heat