Crayon Shin-chan Movie 21: Bakauma! B-Kyuu Gourmet Survival Battle!!

Shinnosuke and the Kasukabe Defense Force secretly head for the B-class Gourmet Carnival, dreaming of tasting Sauce's Ken's legendary yakisoba. On the way, a mysterious woman entrusts them with an equally legendary sauce that must reach Ken, turning their food trip into an unexpected delivery mission.

Lost in the mountains, the children are pursued by the A-class Gourmet Organization, which wants the sauce and intends to wipe out humble B-class food altogether. With no parents to rescue them, Shinnosuke, Kazama, Nene, Masao, and Bo must protect the sauce and find their own way to the carnival.