I'm trying to find the name of the movie.. this movie is a cartoon. Either late 80's or 90's.. a boy is given a puppy for christmas or birthday by his parents.. anyway, this boy plays with a bouncy ball and it bounces into a mirror and he steps into the mirror to go after it and gets stuck in this strange world on the other side of the mirror. The new puppy followed him I think.. please help. Thanks :)!!
