Dr. Slump Movie 04: Arale-chan Hoyoyo! Nanaba Shiro no Hihou

Synopsis

A legendary treasure, the "Eye of Rainbow," capable of granting any wish, is discovered in the Nanaba Castle. A gang of thieves attempts to seize it, but the treasure falls into the hands of Bisna, a descendant of the Nanaba Kingdom. Bisna intends to use the treasure to resurrect a devil and restore their kingdom. Now, Arale and her companions must journey to the hidden castle to retrieve the artifact.