Pikachu is still to tall. It's suppose to be like... 1/3 the size of Ash.
Ash looks fine.
Misty looks to manly, have her arms go down her side instead of jut out like that. And the hair on her right (our left) is to crazy. Tone it down a bit, take out some black lines, and make that whole area less prominent. Brocks hair looks unnatural, the edges are to ... straight? there's no curve.