Sam

I have a headcanon that I'm certain is shared with other fans, that trainers of Mimikyu will make or get special cloths and things for them to wear. Something to pamper them and make them unique among the others. Some trainers will even give them cloths that make them appear like Pokemon other than Pikachu.

I'm defs going to name my Mimikyu "Sam" when I get the chance to catch one. Why? Trick R' Treat!
I'm gonna spoil him~

UPDATE

I've decided to immortalize him as a member of Trainer Sarah's Team
He's the shyest out of all of Sarah's Mimikyus. Always sticking closely to Glimmer the Pikachu, or his trainer, and if he can't stick be either he likes to find a dark place to hide.. He has a harder time fighting outside of double battles, which Sarah is trying to help him overcome. 
However, should Glimmer or his trainer be in trouble, he will jump into action without hesitation.

Sarah has found that wearing nicer outfits helps to boost Sam's confidence, so she always makes sure to have extra fabric on hand in case his disguise tears in battle.


Nature: Timid
Characteristic: Quick to flee

Moves:
Will O Wisp
Payback
Shadow Claw
Play Rough

Ball: Great Ball