Mad Mad Mad Monsters

Mad, Mad, Mad Monsters is a 1972 traditional animated comedy film produced by RankinBass Productions in the United States and Mushi Production in Japan. The special aired on September 23, 1972 as part of The ABC Saturday Superstar Movie. It is a prequel of sorts to the 1967 stop motion animated film Mad Monster Party? which is produced by MOM Productions in Tokyo, Japan in association with RankinBass.

Source: Wikipedia