One of the very best Pokemon artists, like no one ever was, Pearl7 has devoted the majority of their art and skill to a massive amount of stunning Pokemon fan art. Incredibly, Pearl7 has drawn every Pokemon up through 4th generation (493 Pokemon) and has begun on 5th generation, typically drawing each Pokemon individually, using an attack, with no background.
Being a huge Pokemon fan myself, it is exciting to see the work of an artist who is not only very skilled but also interested in adding to the games themselves by interpreting the Pokemon and their attacks in a lot more detail than what is available in the games. Pearl7 has developed an effective style for conveying action and movement, giving the attack’s of each Pokemon plenty of energy and fluidity with the detailed shapes of grass, fire, water, and so on. I personally love how Pearl7 gives each Pokemon a toy-like plasticity with the smooth shading and bright shines; the look keeps the Pokemon feeling stylistically cartoony, unifying them all with a look that is similar to the original Sugimori art but still uniquely different and recognizable.
(update) Note: This artist also goes/went by “Pearl Mode”.
Yuuki (ユウキ) has a way of making their art come to life with motion and action. Although they keep their animated characters simple with blocky shading and anatomy, as well as no lines, they often add another layer of interest and complexity to their scenes with well-planned perspective. This simple look, married with unique perspectives, goes together quite nicely, creating dynamic and graphic compositions.
The artist Sumisu (すみす) has a delicately intricate style that I often associate with many Japanese Pixiv artists. Their graphic work often stands against a white background, drawing you into the isolated character and setting.
Personally, I adore their shapes and “toy box” subject matter. And I would suggest full viewing if you want to see any of the real detail and beauty.
For Sumisu’s Pixiv:http://www.pixiv.net/member.php?id=230759
And for their site: http://rinsumi.yukishigure.com/
Note: This may be inaccurate, but I thought this artist did (or does) go by Rinji Umisu as well.