Slightly Dark Umbreon

A joke image between a friend and I, this is an Umbreon who is not entirely dark (like in Team Rocket card sets), but only kinda dark, nonchalantly standing on grass he shouldn't be standing on.

I drew this by hand, scanned it in, and did all of the coloring in PhotoShop. I like how Umbreon turned out. I was going for cel-shading for everything that ISN'T ground. The only areas I think could use improvement are shadows and the dirt pathway, possibly even the grass. If I could, I'd redo all of those in a cel-shading style, but I don't know how for the life of me.