I think Whimsicott is my favorite shiny overall. I love the white, black, blue, and yellow contrasts.
Now usually I'm a stickler for trying to make my Pokemon plushes look exactly like the images you can find on Serebii or in the Pokedex. This time around however I decided to make my Whimsicott more of my own. The first thing you'll notice is that he doesn't have a gapping mouth. My initial plan was to put a mouth on him but after not having a mouth on him for a while, I grew to liking him this way. I think he's really adorable without a mouth. When I tried putting one on him it just didn't look right to me. I also made some of his tufts of hair a bit different from the standard image.
Also, I was extremely excited when I hatched a shiny Cottonee using the Masuda Method. Sadly, though he didn't have the right ability. I'll have to try again someday but when I do I'm going to make sure that I have the right moves I want to breed down and see if I can also breed down the right nature. That way I'll have an awesome shiny Whimsicott that I'll use all the time.
I haven't officially typed up my pattern for my Whimsicott. I'm also not sure if I want to give or sell my Pokemon patterns considering I know some people who've had their patterns made and sold for profit without regard to the original creator.