I was wanting my kids to see a film I enjoyed as a child but can't remember its name

It was about a furry green monster that could turn invisible lived in a young boys tree house

The monsters name was something like swashbucket I think, it was nearly 20 years since I last saw it and unsurprisingly the VHS has got lost along the way lol

Please help if you remember it

my kids really enjoy watching all the old films with me goonies, ghostbusters etc... and I enjoy the nostalgic value too lol

thank you

Was it fuzzbucket?

My pet monster?