S1E12 : Formidable Enemy! The Warrior, Kaos

Teppei and X continue on their journey into the Area. They meet a mysterious old man named Kaos... Kaos and his B't Lamu used to be legendary warriors for the Machine Empire! X and Teppei must struggle to stay alive as Kaos and Lamu attack them! Episode summary graciously provided by Vortex Fansubs