Too many... omg.
Victini comes to mind first! Loved it in the movie and had a lot of fun using this cute thing on my team in White when its event was released. How can you say no to that face??
Probably my favorite Pokémon overall. It's designed perfectly and is a whole lot of fun to use.. I would love to own a Cinccino in real life. Skill Link is a perfect HA.
Also Shaymin. Again, extremely adorable in the movie and is a grass type which adds some brownie points with me, heh. The sky forme is cute as well but nothing beats Shaymin land forme. <3
Diancie is my spirit Pokémon. Very pink and princess-y, and to die for in her movie. If you can't tell, the movies influence my decisions by quite a lot... x'D Her mega evolution is the best in the game by far too. Beautiful!
By far my favorite eeveelution, if I didn't have the username Sheep I'd probably use it as a name or something that would fit it as a nickname. I have a weakness for fluffy Pokémon and Flareon fits that definition perfectly, though I really wish it had a better moveset!
Seems like a lot of people find Emolga annoying.. but I love it very much. ;_; It's high up on my cuteness list, I especially loved how cute Iris' sounded in the anime.
My favorite starter next to Chespin! Though Chikorita wins cuteness-wise. Very girly and sweet. I find her evolutions cute too but she is definitely the most adorable of them.
Here are some others I find cute, in no particular order (and definitely missing some here!):
