The Case of the Stuttering Pig
1937
The Case of the Stuttering Pig is a 1937 Warner Bros. Looney Tunes animated cartoon directed by Frank Tashlin. The short was released on October 30, 1937, and stars Porky Pig and Petunia Pig. The title is a parody of The Case of the Stuttering Bishop, a Perry Mason mystery that Warner Bros. had filmed earlier that year. This is the only cartoon where Petunia Pig appears as Porky's sister. Wikipedia