As the warriors travel the world in search for the pieces, they are time and again attacked by Necalli, an ancient Aztec fighting god that appears in times of crisis to challenge the strongest living fighters in order to devour their souls, as well as by Shadaloo's minions and dolls.
As the world is in chaos with the imminent fall of the Black Moons, Ryu returns from his training and defeats Necalli in combat, forcing the ancient god to retreat definitely.