Kokin-chan appears in the animated film *Soreike! Anpanman: Buruburu no Takarasagashi Daibouken!*, credited solely through Aya Hirano's voice acting role. While extensive franchise materials detail characters like Anpanman, Baikinman, Uncle Jam, and various supporting heroes and villains—covering their backgrounds, personalities, and narrative functions—Kokin-chan receives no elaboration in these sources. Film synopses, character guides, and franchise overviews omit her story involvement, relationships, and character development, limiting documentation to the voice credit.