With the battle machine attached, this looks like a Gundam figure. Hard to find as an unopened seal box.
From Lego.com:
Built by Ryo from designs downloaded from the golden computer, Aero Booster is a standard battle machine body with a massive, detachable rocket and weapons pack. This amazing piece of machinery allows the Aero Booster to achieve speeds even exceeding that of the Sky Guardian, as well as giving it weapons power superior to any other battle machine in EXO-FORCE's arsenal. Piloted by Ha-Ya-To, it is the most powerful defender of the golden city.