Ghostbusters Marshmallows (aka: ゴーストバスターズマシュマロ) is a sweet food produced by Mitsubishi Foods and released on August 29, 2016 in promotion of the Ghostbusters (2016 Movie) in Japan. It is a limited edition snack food.
Note that information is taken from the official Mitsubishi Foods PDF.
Popular character a fluffy marshmallow. It was confined to the package of "Marshmallow Man".