Stepsister from Planet Weird, Disney Channel
Disney Wiki; DC Wiki; IMDb; TV.com; TV Tropes; Wikipedia
I'm sure I saw this, and probably thought it was okay (but not great). But I probably never would have remembered it if I hadn't seen it on a list of DCOMs. So... I'm not even going to try to describe it. I'd just be cribbing from Wikipedia, so you might as well look there. But maybe someday I'll see the movie again and write a review.