Masters of the Universe (1987)

Masters of the Universe is one of those movies that is so incredibly stupid it’s actually kind of fun. It tells the story of He-Man who has come to earth in order to retrieve a magic “portal key” that was lost in a hasty retreat from the evil Skeletor. They happen upon two earthlings Julie and Kevin who help them in their epic quest. Of course everything turns out all right in the end. By the Power of Grayscull!
A fun fact is that Kevin goes onto play Tom Paris on Star Trek Voyager.