Some full length movies of nominees and winner of the Academy Award 1946 for the animated short category as Short Subjects (Cartoons).
The Cat Concerto – Metro-Goldwyn-Mayer Fred Quimby – Winner
Musical Moments from Chopin – Walter Lantz Productions, Universal
The version I found has some Portuguese voice over.
John Henry and the Inky-Poo – Paramount – George Pál
Sorry, nothing available. Click on the title to get information from IMDB.