What production company or companies created XXX?
Elmer's Candid Camera
Elmer's Candid Camera is a 1939 Merrie Melodies directed by Chuck Jones, and first released on March 2, 1940, by Warner Bros. It marks the first appearance of a redesigned Elmer Fudd (voiced by Arthur Q. Bryan), and the fourth starring appearance of Happy Rabbit (excluding Elmer's Pet Rabbit, where he was billed as Bugs Bunny, the first instance of that name being used on-screen, and a cameo in a later cartoon Patient Porky) until Looney Tunes:
Warner Bros.