I personally like the unity that the reuse of the colors gives over the google search ivysaur.
Great use of planes to define the form. You might consider an extra skin color to round it off to 10 to act as a buffer between the sharp face-to-jaw color transition, but outside of that, and perhaps a little more hueshifting in the skin colors (some environmental light always reflects onto the skin, such as from the sun or dirt), I think you're all set.