Silly Symphony cartoons were distributed by Walt Disney Productions from 1929-1939, and included mostly nonrecurring characters. They did, however, start Donald Duck's career and featured Pluto in his first cartoon without Mickey Mouse.
The Three Little Pigs were the only characters to actually reappear in the Silly Symphonies cartoons, they had three sequels to their original cartoon.
The original Silly Symphony cartoon was The Skeleton Dance which premiered on April 29, 1929. It was voted #18 in the 50 Greatest Cartoons of all time by animators.
Production on the Silly Symphony cartoons stopped in 1939, so that the studio could focus on feature length films.
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