Loopy De Loop was the only theatrical cartoon short series produced by William Hanna and Joseph Barbera after leaving MGM and opening their new Hanna-Barbera Studios. The series, distributed to theatres by Columbia Pictures, ran in theaters from November 5, 1959 (1959-11-05) to June 17, 1965 (1965-06-17).
Read more about Loopy De Loop: Overview, Television, Cast, Other Appearances