This is the mass-produced ν Gundam from Mobile Suit Gundam Hathaway: Circe's Witch.

It's the core unit of the Allyzeus, the flight form training machine for Penelope that appeared towards the end of the film. The Allyzeus itself and its partially destroyed state will be uploaded separately. This is a mass-produced prototype of the RX-93 ν Gundam. As a core MS, transformation mechanisms have been added to the head antenna and hip joints. Options such as the Incom unit, Fin Funnels, and arm-mounted beam spray guns have been omitted. The prototype beam rifle is a prototype model of the beam rifle equipped by Penelope, and its barrel is split into two parts.

RX-94 Mass Production Type ν Gundam (Alli Zeus Core Unit) | トーナ's Gunpla works