Scooby-Doo and the Alien Invaders
Starring Scott Innes, Mary Kay Bergman, Frank Welker, B.J. Ward, Jeff Bennett, Jennifer Hale, Mark Hamill, Candi Milo, Kevin Michael Richardson, Neil Ross
It's a animation and family movie, and has a rating of 6.8 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Denmark.