蜡笔小新：呼风唤雨！猛烈！大人帝国的反击

这天在小新居住的春日部附近，突然新开了一家叫“20世纪博”的游乐园。游乐园里到处播放着从前20世纪的旧的电视节目和电影，这里，一切都是从前时光的回放。每一个到了这里的大人，都沉浸在过去的旧时光里，而对小孩子来说，这些的东西一点意思都没有。令小新万万想不到的是，进入了游乐园的爸爸妈妈都不在理会其他事情，只是一直沉醉在以往的时光里。城里的大人们都进去了，只剩下了小孩子！这到底是谁的阴谋，小新他们能否粉碎这阴谋？As the 21st century approaches, a new 20th-century museum has opened in town, for the adults to relive their childhood. However, the owners of the museum seem to have other plans for it. The adults start to behave strangely, and one morning, they abandon their children for the 20th-century museum. Shinnosuke, along with his friends, must now rescue his parents and stop the world from returning to the 20th century before they get captured.