Kintaro is a gigantic humanoid with four arms. He was introduced as a replacement for the great Shokan prince Goro, and was everything Goro was (including being of the Shokan race), but only meaner, bigger and harder to defeat. Being the supreme commander of Outworld's armed forces, he is only second to Shao Kahn himself. He has more clearly defined feline aspects than Goro, with tiger stripes on his back (more recently, claws and cat-like digitigrade feet in his Armageddon makeover as well), and has the ability to spit fireballs from great distances.
goro=big guy with four arms.
kintaro=big guy/cat/monster with four arms and fireballs.