DeviantART file: http://unownace.deviantart.com/art/Mimikyu-Plush-Costume-For-a-Pikachu-Doll-625374463
Here's another...thing I've been working on for a while. XD It's a Mimikyu "costume" accessory for certain Pokemon plushies, like the Pikachu doll shown in the example here. I basically just put it together with some scrap fabric from an old sweater and a few other pieces of material lying around, and added a small zipper at the bottom. I WOULD have made it from yellow fabric, but unfortunately I don't have enough on hand right now. XD
I may add a few more details later, like some black sharpie-shaded ear-tips and the belly "eyes".