Sore Ike! Anpanman: Roll to Laura Ukigumojou no Himitsu

Rollpanna wanders into Ukigumo Castle, a mysterious fortress in the clouds that cleans polluted air and sends life-giving rain back to the world below. There she meets Princess Laura, who is struggling alone to repair the castle's failing machinery, and the two quickly become close friends.

When Baikinman attacks in hopes of seizing the castle, Rollpanna is struck by a beam made from Bacteria Grass and becomes the coldhearted Black Rollpanna. Anpanman, Melonpanna, and Laura must restore both the castle and Rollpanna's gentle heart before Baikinman's polluted rain spreads across the world.