Lyeon appears in the film *Fūsen Inu Tinny: Nandaka Fushigi na Kyouryuu no Kuni*. When a balloon dinosaur egg unexpectedly plummets from the sky and bursts open, the newborn Torii instantly bonds with Tinny and Nitty as parents. This compels Lyeon to join Tinny, Nitty, and their companions on a journey to the balloon dinosaur world above the clouds to find Torii's true family. Soaring through environments like golden cumulonimbus clouds, their destination is the land of the Triceratops. Arriving there, they discover Torii's parents are missing and learn a crisis plagues the community: balloon dinosaur eggs are being stolen. Lyeon participates in the urgent search for Torii's family and the efforts to solve the egg thefts within the balloon dinosaur realm.