credits to NikeSkyLark.
These are from the very first episodes of X-Man aired in 2003. Tony An and Eun Ji Won were on opposite teams (surprise, surprise), so it was inevitable that they would face one another in some of the events.
These are my cuts from the shows that had me rolling. They wear big samuri costumes to fight one another, than big animal costumes to run a relay. Yoon Hyun Jin and Yoo Jae Suk are also in the clip (opponents during the relay race).