Mimikyu @ Mental Herb  
Ability: Disguise  
Level: 50  
EVs: 244 HP / 252 Def / 12 SpD  
Impish Nature  
IVs: 0 SpA  
- Play Rough  
- Trick Room  
- U-turn  
- Will-O-Wisp

Unown
Options:
- offensive: Shadow Claw
- supportive: Shadow Sneak, Strength Sap, Taunt, Safeguard
- items: Babiri Berry, Lum Berry, Safety Goggles
- Nature: Relaxed

Unown
Offensive calcs:
- 0 Atk Mimikyu Play Rough vs. 0 HP / 0 Def Urshifu-Single Strike: 192-228 (109.7 - 130.2%) -- guaranteed OHKO
Defensive calcs:
- +1 252+ SpA Mega Empoleon Origin Pulse vs. 244 HP / 12 SpD Mimikyu: 109-130 (67.7 - 80.7%) -- guaranteed 2HKO
- 4 Atk Kartana Smart Strike vs. 244 HP / 252+ Def Mimikyu: 110-132 (68.3 - 81.9%) -- guaranteed 2HKO

Unown
Useful partners:
- Trick Room abusers: Snorlax, Glastrier, Stakataka, Torkoal