These are pretty good mate, don't really have much for critique.
Hmm, on the other hand, I do find that replacing the black outline with their proper colors usually looks better, you could always try doing that and seeing if you like it. You'd probably be better off in the long run if you got rid of the black outlines, it makes things feel more tangible or whatever.
I just noticed Elmer Fudd got turned into a wascly wabbit haha.