Sore Ike! Anpanman: Tsumikijou no Himitsu

Building Block Island and Origami Island have lived in bitter rivalry, even though Prince Block and Princess Origa hope their people can finally become friends. Baikinman exploits the feud by disguising himself and driving the islands further apart, while secretly pursuing the legendary power hidden within Building Block Castle.

His scheme leads to Prince Block being cast out and Princess Origa falling into danger as Baikinman awakens a gigantic block robot for his own purposes. Anpanman and his friends must stop the deception before the old quarrel destroys both islands and the two young royals' hope of bringing them together.