{ { Infobox film
| native_name =
| name = Crayon Shin-chan: Unkokusai's Ambition
| image = Crayon Shin-chan Unkokusai's Ambition.jpg
| caption = Theatrical release poster
| director = Mitsuru Hongo
| based_on = { { based on|Crayon Shin-chan|Yoshito Usui}}
| producer =
| writer = Yoshito Usui
| screenplay = Keiichi Hara
| starring =
| music = Toshiyuki Arakawa
| cinematography = Hideko Takahashi
| studio =
| editing = Hajime Okayasu
| distributor = Toho
| released =
| runtime = 96 minutes
| country = Japan
| language = Japanese
| gross = ¥1.42 billion ($11.1 million) }} , also known as Mr. Smelly's Ambition, is a 1995 anime film. It is the 3rd film based on the popular comedy manga and anime series Crayon Shin-chan. The film is produced by Shin-Ei Animation, the studio behind the anime television.
Plot
An officer of 30th century travelling through time using time patrol machine, conducts an emergency landing in deep underground, in the backyard of the Nohara family's house, under Shiro's doghouse.
The officer takes control over Shiro's body and tells the Nohara family about disturbance in the Sengoku period and requests them for help. They agree to the proposal with hesitance. The three of them wear period-adaptable suits, with Shinnosuke wearing a special suit contrasting the "Save3X" feature, and start for that period.
After landing on the ruins of a castle, when some masked people attack them, a swordsman Fubukimaru arrives and fends them off. Fubukimaru tells that Unkokusai killed Fubukimaru's father and mother and captured his sister. Fubukimaru recounts the prophecy, that when castle falls into crisis, ”three heroes and one dog” will save it, and believes that the Nohara family are them and asks them to help him defeat Unkokusai. They agree to do so, mostly because one of Unkokusai's henchmen stole Misae's handbag containing important things.
The Nohara family start their journey to Unkokusai's palace with Fubukimaru and his horse. On the way, they are attacked by Unkokusai's henchman, Matabi. Shinnosuke uses the “Save3X” feature and help Fubukimaru by turning into a cockroach. Meanwhile, Unkokusai's woman sidekick, Ogin, who turns Hiroshi and Misae into balls.
That night, they stopped at hot spring. When Fubukimaru went to bathe, Shinnouske and Shiro follow Fubukimaru inside and discover that Fubukimaru is a woman. Fubukimaru tells them that her father had no boys as his heir, so he raised her up as a boy. Suddenly, Unkokusai's henchman, Tamashiro attacks them. Shinnouske turns into a frog by using the “Save3X” feature and helps Fubukimaru to defeat Tamashiro. They soon enter in Unkokusai's castle, where they come across Ogin, who pulls Fubukimaru by her hair. Suddenly, Fubukimaru stabs Ogin with her dagger and Ogin splits out a green smoke on Fubukimaru, which makes her body unable to move. A paralysed Fubukimaru, gives her sword to Shinnouske asking him to defeat Unkokusai.
Soon, Shinnosuke and Shiro enter in a dark room, where they come face-to-face with Unkokusai. Shiro reveals that Unkokusai is the 30th century's history freak, Pierre Jakoman. Shinnouske and Jakoman have a fight, in which Shinnouske uses his “Save3X” feature for the third time and gets transformed into a samurai. During the fight, Shinnouske's sword gets stuck at the roof and he transforms into original self and falls. The edge of the sword hits Jakoman on the head and he falls from castle cliff. Suddenly, a woman named Ring comes towards Shinnouske and introduces herself as an officer from the time patrol in the 30th century. Ring informs Shinnouske that she only borrowed Shiro's body and apologises for putting him and his family in trouble. Fubukimaru arrives and questions Shinnouske about her sister. Suddenly, wind blows from Shinnouske's body through which his parents and Fubukimaru's sister Yukino appears. Fubukimaru reveals that Yukino, is actually a man.
In the next morning, Ring and the Nohara family leave for their century. Fubukimaru and Yukino bid them a farewell. Afterwards, Fubukimaru is woken up by a soft voice, which turns out to be her mother, who asks her to leave for the war (because Jakoman left the century, everything must have become normal).
