Dark Cloud - Demon Shaft Boss Black Knight Pendragon Without Getting Hit

After you complete the Dark Cloud game you reveal an additional extra level called the Demon Shaft on your world map. This extra level has 99 floors full of enemies with the boss waiting for you on the 100th floor. This level is pretty challenging with the elemental attribute of the enemies changing every 20 floors.

This is a video of me battling the two forms of the Black Knight Pendragon without getting hit once during the fight.