Comical adventure story starring Kasukabe Defense Forces and dealing with "food" as theme. Kasukabe Defense Forces (Shinnosuke and his mates: Kazama-kun, Nene-chan, Masao-kun and Bo-chan) decide to attend "B-class Gourmet Carnival", a big event in Kasukabe, without their parents, to eat very tasty yakisoba sauce cooked by "Sauce’s Ken". On the way, a mystery woman asks them to bring a legendary sauce to Sauce’s Ken. They head to the event site with the sauce, but they wander off into a mountain, and "A-class Gourmet Organization", an organization plotting to eliminate B-class gourmet, seeks to take the sauce away from them.
- Other Title: Crayon Shin-chan Movie 21: Bakauma! B-Kyuu Gourmet Survival Battle!!, 映画クレヨンしんちゃん バカうまっ! B級グルメサバイバル!!, Shin Chan Película 21: El Secreto está en la Salsa, Crayon Shin-chan Movie 21: Ridiculously Tasty! B-class Food Survival!!
- Status: Completed
- Sub/Dub: Anime Sub
- Anime Type: Movie
- Genres: Adventure, Comedy, Gourmet, Seinen, Action
- Characters: Nohara, Hiroshi, Nohara, Himawari, Nohara, Misae, Nohara, Shinnosuke
- Score: 7.08
- Rank: 3679
- Popularity: 8117