Thievul @ Psychic Seed  
Ability: Unburden  
Level: 50  
EVs: 252 HP / 4 Def / 4 SpA / 28 SpD / 220 Spe  
Timid Nature  
IVs: 0 Atk  
- Foul Play  
- Fake Tears  
- Snarl  
- Protect

Unown
Options:
- supportive: Taunt
- items: Misty Seed, Grassy Seed, Electric Seed, Acidic Seed

Unown
Offensive calcs:
- 0 Atk Thievul Foul Play vs. 252 HP / 0 Def Mega Dhelmise: 180-212 (101.6 - 119.7%) -- guaranteed OHKO
Defensive calcs:
- 252 SpA Fairy Aura Mega Meowstic-F Moonblast vs. +1 252 HP / 28 SpD Thievul: 152-180 (85.8 - 101.6%) -- 6.3% chance to OHKO

Unown
Useful partners:
- terrain setters: Tapu Lele, Rillaboom, Tapu Fini, Tapu Koko, Mega Dragalge