Casper (1995)
An afterlife therapist and his daughter meet a friendly young ghost when they move into a crumbling mansion in order to rid the premises of wicked spirits
My Favorite Martian (1999)
A Martian lands on Earth and makes friends with a reporter
The Brave Little Toaster Goes to Mars (1998)
Thomas M Dischs sequel, based on the book sequel, has our heroes zooming off to, of all places, Mars