80's children's movie about a furry creature
So I remember seeing this movie when I was a kid and it has been really bothering me for some reason that I can't remember it. It is about a kid, I think a boy, who finds a creature, possibly an alien or maybe a kid sasquatch. The creature is the focus of the whole film. He is a kids height and a little chubby, but covered in fur, almost like a little ALF. Anyway, the kid tries to help the creature hide, etc. There is a treehouse as well that I think they use to hide it in.
I remember seeing this in either the late 80s or early 90s. I am also pretty sure that it was shown on Wonderful World of Disney because I watched that every week and the two memories seem to go together. This may mean that it was a made for TV movie because they were known for doing that a lot back then. I have searched their information, but found nothing.
Any help would be much appreciated.
Also, it is not e.t. or mac and me...