It's looking really good for a first vector, and right on, I got myself a DSi and HeartGold after doing a Pichu vs Squirtle picture.


A few things I noticed:

You don't use outlines for the outside, but you do for the cheeks and the mouth. This makes it seem a little odd were some have none, and others have it.

On the left ear, I can see some of the base yellow on the top side were the off black should be, it isn't quite aligned right.

The shadow on the bottom side overlaps the foot, but it shouldn't match, it would be lower, and the sides of the shadow will be lower than the centre.

There is some sort of weird highlight within the mouth that looks odd.

The nose isn't quite shaped right.

The few spots you added a little outline for the arms and the leg, should have been accomplished with shadows instead.