A ghost named One Boo Bascom has moved out of his drafty old castle. The house he chose to move into belongs to Monica and Sandy's Aunt Agatha, who runs straight to her brother's the moment she sees Bascom. A ghost named One Boo Bascom has moved out of his drafty old castle. The house he chose to move into belongs to Monica and Sandy's Aunt Agatha, who runs straight to her brother's the moment she sees Bascom.