Teacher Amy and the Kingdom of Cats

Synopsis

Burton and the others get excited looking at the souvenirs Mallet and Bucket brought back. Amy takes a liking to the cat mask and ends up keeping it. But from the moment the mask is in her hands, Amy starts acting strange. Meanwhile, Burton and the others are asked to find a missing cat and do locate it, only to be blocked by a whole gang of cats. Goro, who was watching all this, joins the cats' nighttime gathering. And the one who appears there is none other than…!?