I can't believe I've missed out on voting for other types! Oh well, this sounds fun. :3
My vote went towards multiple Pokemon, but mainly Klefki, the Flabebe line, Sylveon and of course Whimsicott!
1. I quite like Klefki's design. I don't see why most people don't. Sure, it may be a key-chain Pokemon, and it's stats might not be the best, but Klefki only has two weakness, and neither Poison or Dragon can hurt it! Also, barely any other types have much affect on this cute Pokemon. Plus it's movepool isn't that bad.
2. Flabebe is just an all-together adorable Pokemon, and the same goes to Floette of course! Florges is more on the beautiful and delicate side (it's name speaks for itself), and with it's great Sp. Defence and Sp. Attack, I think it has quite a bit of potential!
3. With Sylveon's Pixilate ability, high Sp. Attack but low Attack, it could definitely take advantage of the powerful Normal-type moves it learns by HM. I haven't used this Pokemon myself, but it seems a lot of other people have.
It's also very cute. c:
4. Now, this Pokemon is simply just adorable! The cotton, the ram horns and dat grin! <3 It isn't my favourite Pokemon without a reason. With it's prankster ability and variety of status moves, it could make quite the staller! Plus it has healing moves (the best would be Giga Drain).
Well, that's my choice of Fairy-type Pokemon for this year! :3