Hun-Grr is one of the five Terrorcons that combine to form Abominus.  He is a Decepticon with the function of Terrorcon Leader.  Besides forming the body and head of Abominus, Hun-Grr also transforms between his robot mode and his two headed dragon mode.  Having two mouths to feed he spends most of his time eating and because his mouths are usually full he is often misinterpreted when he gives orders.

The Generation 1 Hun-Grr was released in 1987.  He was also available in the Abominus gift set released in Japan in the same year.