Bouken-tachi Gamba to Nanbiki no Nakama
Genres: Adventure
Type: Movie, Episodes: 1
Aired: Mar 4, 1984
Studio: Tokyo Movie Shinsha
Source: Novel
Rating: G - All Ages
Synopsis:
When a badly injured mouse staggers off a ship in Tokyo Harbor, he tells the local mice that he has escaped from Devil's Island, where Noroi, the evil white weasel, has crushed the mice with his reign of terror. Tough-guy Gamba rashly promises to help depose Noroi.

(Source: The Anime Encyclopedia)