In Oriental City, Knuckles searches for and reunites with a treasure hunter known as Hawk. The two get out of the dungeon, ride the pedicab, and go to the (red) Chaos Emerald's hiding place. That is where they're met with the pedicab driver from earlier, who turns out to be a female ninja robot (kunoichi) Eggman sent in. Knuckles begins his heroic battle revolving around the Chaos Emerald against the female ninja robot. (thetvdb.com)