Sore Ike! Anpanman: Anpanman to Santa-san e no Tegami

On Christmas Eve, the children are writing letters to Santa with their wishes. However, Melonpanna is alone and looks gloomy. She wants to spend Christmas with her big sister Rollpanna. Meanwhile, Baikinman is plotting some evil scheme to get all the presents for himself. Will Anpanman be able to protect the children's letters? Will Melonpanna's wish come true? (Source: Amazon, translated)