Hidetoshi Dekisugi appears in a supporting role within "Doraemon: Nobita's Little Star Wars 2021". He joins Nobita, Gian, and Suneo in creating an independent film titled "The Great War of the Universe". They use a diorama set at Suneo's house during summer vacation. During filming, he witnesses Nobita's mistakes leading to Suneo and Gian excluding Nobita from the activity. Afterward, Dekisugi watches the completed film during a screening at Suneo's house. He expresses surprise at its ending, specifically remarking on its startlingly realistic and impactful nature. He directly questions Doraemon, Nobita, Shizuka, Gian, and Suneo about how they achieved such a convincing finale. This prompts the group to lean forward conspiratorially and offer to share the story of their adventure on Pirika, implicitly connecting their real experiences to the film's events.