Your sprites are pretty good, although with some practice they can become epic! :3
My challenge, if you choose to accept it,
1st pokemon (No Base, not for what I want.): Aggron
( optional)4th: Houndoom
These are pokemon with a lot of awesome details you can use.
I want you to make an amalgamon.
Its shades should flow nicely, and its outlines should too.
It seems like hard work, but it will be GREAT practice. n_n