In "Belle", Lilo, Stitch, Jumba, Pleakley and Mertle hike the Ali'i Trail in search of the alleged Night Marchers (an ancient Hawaiian legend). After a while, the group starts hearing loud screams, which Lilo mistakes for that of Night Marchers, and frightens the entire group. Jumba soon recognizes the ear-piercing shrieks to be Experiment 248 (Belle), and the group eventually finds Belle standing on top of a rock. Lilo, Stitch, Jumba and Pleakley manage to get a hold of Belle, but she then runs off into a cave to Gantu, who was pretending to be a Night Marcher to get her, which Mertle talked Gantu into doing after running into him earlier. However, when Belle's piercing screams were too much for Gantu and Mertle to bear, they beg Lilo and the others to take her. Jumba then sucks Gantu up with a vacuum and mocks his Night Marcher antics.
Although Mertle points out to Lilo that she hadn't proven the Night Marchers truly existed, Lilo is not discouraged. She then says goodbye to Mertle and goes home with Stitch, Jumba and Pleakley. Mertle retorts angrily until she suddenly hears drums and then sees figments of Night Marchers approaching her. She screams in terror as Mrs. Edmonds arrives to pick her up. Mertle then hops in the car and tells her mother to drive them out of here.
- The term "ali'i" references the Hawaiian language that refers to the hereditary line of rulers, the noho ali'i, of the Hawaiian Islands.
- The alleged Night Marchers references the Hawaiian legend, Nightmarchers, which are the ghosts of ancient Hawaiian warriors.
- Also, Lilo's theory on anyone who stares into their eyes will turn to stone references about how anyone looking upon or seen by the Nightmarchers will die.