Sore Ike! Anpanman: Yuurei Sen wo Yattsukero!!

Synopsis

Two estranged sisters, Melonpanna and Rollpanna, find common ground when they both encounter a magical horse named Marin. Marin reveals a hidden treasure to Rollpanna: a ship she retrieves from the ocean floor. Witnessing this, the villainous Baikinman devises his own spectral vessel with the assistance of Dr. Hiyari. His ultimate goal is to corrupt Rollpanna, turning her into a force to help him conquer Anpanman.