Corviknight @ Corviknite  
Ability: Mirror Armor  
Level: 50  
EVs: 252 HP / 180 Def / 76 SpD  
Impish Nature  
IVs: 0 SpA  
- Brave Bird  
- Roost  
- Body Press  
- Iron Defense

Unown
Move options:
- offensive: Iron Head, Power Trip
- supportive: Bulk Up

Unown
Offensive calcs:
- +2 180+ Def Mega Corviknight Body Press vs. 236 HP / 4 Def Incineroar: 194-230 (97 - 115%) -- 87.5% chance to OHKO
Defensive calcs:
- 252 SpA Transistor Regieleki Thunderbolt vs. 252 HP / 76 SpD Mega Corviknight: 170-204 (82.9 - 99.5%) -- guaranteed 2HKO

Unown
Useful partners:
- screen setter: Grimmsnarl, Regieleki