This robot paper model is Mazinkaiser, a fictional robot from the same named anime and manga series, based on Go Nagai's Mazinger Z and featured in the 2001-2003 OVA series, Mazinkaiser and animated movie, Mazinkaiser: Deathmatch! Ankoku Daishogun, the papercraft created by Kyuri, and shared by Kevin Chapman.
Like the Mazingers before it, Mazinkaiser's cockpit is located in a separate vehicle which functions as a jet fighter. It is armed with a laser beam in the tip of the nosecone. During the Mazinkaiser movie, Boss hid the Pileder inside Boss Borot to keep it safe from the Mycene.