If it looks so close to the Stuart Mouse, even with a different name, there could be some copyright/trademark concerns on behalf of the Stuart Mouse owner, and I know there would be problems with Walt Disney.

You can post this question in the copyright forum and get a better more detailed answer from someone who actually knows about copyright though:

http://www.renderosity.com/mod/forumpro/showforum.php?forum_id=12395

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi