Info: Kukuruku appears in the second movie ‘Unico: Mahou no Shima e’. He is wanting to make a fortress out of living dolls. He uses Torubi/Tolby to zap living creatures into these dolls and ships them out to the island Kukuruku is living.
Kukuruku was once a marionette who was tossed out when the owners were done with him. His hatred and loneliness allowed him to gain powers to seek revenge.
The english version cuts Kukuruku’s name short and makes it Kuruku or Lord Kuruku. This character is not in any of the manga.