Dokin-chan appears in the cast of the ninth Anpanman movie, "Niji no Pyramid," released on July 26, 1997. Information detailing her specific role, actions, story arc, background, or character development within this particular film is not available. While Dokin-chan's established traits across the franchise are documented elsewhere—including her partnership with Baikinman, her selfish yet occasionally kind personality, her crush on Shokupanman, and her use of a pink UFO and size-altering staff—these elements are not explicitly connected to her activities or interactions in "Niji no Pyramid." No plot points or character development specific to her appearance in this movie are provided.