The Ranking-Bass stop-motion film Mad Monster Party? from 1967.

On the Isle of Evil, the head of the "World Organization of Monsters" reveals his imminent retirement and that he has refined a formula for total destruction, only to be upset when the monsters try to steal the formula and kill his nephew.

It ends with the nephew repeating the same words over and over, revealing himself to be his uncle's creation as well. Followed by the 1972 sort-of sequel Mad Mad Monsters, this time in traditional animation. The trailer:

The Rankin-Bass stop-motion film Mad Monster Party from 1967?

On the Isle of Evil, the head of the "World Organization of Monsters" reveals his imminent retirement and that he has refined a formula for total destruction, only to be upset when the monsters try to steal the formula and kill his nephew.

It ends with the nephew repeating the same words over and over, revealing himself to be his uncle's creation as well. Followed by the 1972 sort-of sequel Mad Mad Monsters, this time in traditional animation. The trailer:

The Ranking-Bass stop-motion film Mad Monster Party? from 1967.

On the Isle of Evil, the head of the "World Organization of Monsters" reveals his imminent retirement and that he has refined a formula for total destruction, only to be upset when the monsters try to steal the formula and kill his nephew.

It ends with the nephew repeating the same words over and over, revealing himself to be his uncle's creation as well. The trailer:

The Ranking-Bass stop-motion film Mad Monster Party? from 1967.

On the Isle of Evil, the head of the "World Organization of Monsters" reveals his imminent retirement and that he has refined a formula for total destruction, only to be upset when the monsters try to steal the formula and kill his nephew.

It ends with the nephew repeating the same words over and over, revealing himself to be his uncle's creation as well. Followed by the 1972 sort-of sequel Mad Mad Monsters, this time in traditional animation. The trailer: