I've had Colors! 3D for several months now, and I recommend it to anyone with a 3DS, it is the best drawing program I have ever used. I've found that I prefer using it over pencil and paper!
So far, I only have one Pokémon painting so far, so I'll post that one first:
And here are my other favorites:
EDIT: Colorslive has apparently changed the way they do their URL's...
A link to my entire gallery is in my signature!