All I remember are very vague details, probably 25 years ago or so.
A young girl (blonde?) is in search of her father who seems to be lost in another world of sorts. I believe he is in a bubble, and spoke to her sometimes but you could only see his silhouette through the shape of his bubble...? I don't know if he was lost between worlds or what. She couldn't ever get to him.
If I'm not mixing cartoons up, she had a koala that hung out in the tree outside her window. Graphics were realistic for that time period.
I'd love to know if this sounds familiar to anyone!