Gamba to Kawauso no Bouken
Japanese title: ガンバとカワウソの冒険
Alternative titles: The Adventure of Gamba and the Otter
Type: Movie
Source: Unknown
Episodes: 1
Status: Finished Airing
Aired: Jul 20, 1991
Duration: 1 hr 15 min
Rating: PG - Children
Producers: Tokyo Movie Shinsha
Genres: Adventure
Themes: Anthropomorphic
Demographics: Kids

The final chapter of the Gamba saga, released in theatres 15 years after the original TV series.

(Source: AniDB)