ONE OF my favorite artists is Yuka Morii - the clay artist. I have a LOT of favorites of hers, but I really like the Bulbasaur cards she did - the first is a Japanese excusive, the second is Ditto as Bulbasaur, and the third is the Venusar & Snivy tag team. The Ditto Bulbasaur, though, is most characteristic of why I like her cards - a realistic looking Pokemon in an actual outdoor setting, making it look so real! A few of my other favorites are Sandshrew, Castform Sunny Form, and Sizzlipede!
Here is a good place to flip through Yuka Morii's Pokemon Cards: Link.