Crayon Shin-chan Movie 25: Shin-chan Shuurai! Uchuujin Shiriri
English title: Crayon Shin-chan: Invasion!! Alien Shiriri
Japanese title: 映画クレヨンしんちゃん　襲来!! 宇宙人シリリ
Type: Movie
Source: Manga
Episodes: 1
Status: Finished Airing
Aired: Apr 15, 2017
Duration: 1 hr 45 min
Rating: G - All Ages
Studios: Shin-Ei Animation
Genres: Adventure, Comedy, Sci-Fi
Demographics: Seinen

The film's story begins when Shiriri, an alien, arrives and turns Hiroshi and Misae into children. To turn them back, Shinnosuke must travel the length of Japan with Shiriri hidden in his butt. Meanwhile, Shiriri's father is moving forward with a huge conspiracy. 

(Source: ANN)