I can't stand how many people keep saying "fairy type"... when there's nothing pointing to it or a new type in general. Not saying I'm completely against the idea... I just hope that if it is real, it's based more on the classical "fairy" than the modern one... that way we can get some Unseelie Pokemon.
I think your wasting your time sticking to something that has no evidence for it's existence.
Colors and style are reminiscent or chansey and audino: white, pink, fluffy, cute. Creating a new type would throw off mechanics of the game considering how many pokemon they have already, and the small number they plan to bring in.
Any other type would be more obvious, bug would have antennae or other insect features, flying would have bigger wings, fighting would be more muscular, dragon would... Have scales or something.