Merrie Melodies - The Scarlet Pumpernickle (1950)

The Scarlet Pumpernickel is a 1950 Warner Bros. Merrie Melodies theatrical cartoon short, directed by Chuck Jones and written by Michael Maltese. The cartoon was released on March 4, 1950, and features Daffy Duck, along with a number of Looney Tunes stars. The title is a play on the 1905 novel The Scarlet Pimpernel.
In 1994 it was voted No. 31 of the 50 Greatest Cartoons of all time by members of the animation field.
Voice Cast:
Mel Blanc as Daffy Duck, Porky Pig, Sylvester, Elmer Fudd, and J.L.
Bea Benaderet as Melissa Duck (uncredited)

Production:
This Looney Tunes short has an unusually large cast of "star" characters (which, in addition to Daffy, Porky, and Sylvester, includes Elmer Fudd, Henery Hawk and Mama Bear from Jones' Three Bears series).
It's notable that, in keeping with the rivalry between Bugs and Daffy that the former is not part of the cast.
Mel Blanc voices Elmer Fudd, who plays the role of an innkeeper here. Elmer was originally voiced by Arthur Q. Bryan, but since the character had only one line of dialogue, Mel Blanc was told to go ahead and imitate Bryan's voice for the character. Blanc did not like imitating, however, believing it to be stealing from another actor.