Bongo the Bear is the titular protagonist of the 1947 featurette of the same name, originally a segment to Fun and Fancy Free. He is a bear cub who escapes the unfair treatment he faces in the circus.
A 30 minute short film where after the animators at Disney Studios leave for the day, suddenly Mickey and Minnie jump out of the pictures and round up all the animated Disney characters in history for one giant group photo after 100 years.