In Mortal Kombat II, Hornbuckle is the name fans have given to the character resembling Liu Kang in the background of the Pit II stage, wearing green pants, opposite Blaze. The name Hornbuckle comes from the hints that Jade and Smoke, two secret characters in the game, would randomly give before matches.
One of Jade's hints was "Hornbuckle Who?". This was a reference to someone named Leanne Hornbuckle who appeared in the credits for Mortal Kombat II. Fans took this as the name of the character in the background.