Tondemo Nezumi Daikatsuyaku
English name: The Legend of Manxmouse
Genres: Adventure
Type: Special, Episodes: 1
Aired: Jun 30, 1979
Studio: Nippon Animation
Source: Novel
Rating: G - All Ages
Synopsis:
This animated story features Manxmouse, the mouse that looks like a rabbit, and all because of his ears. Join in the adventures in this delightful story. 

(Source: MSN Movies)