At the start of the match he will cover one side of his face with one hand, and cover his body with the other. If you swing a jab or body blow at the uncovered portion of his face or body respectively, you will get past his defense. He tends to switch his hands back and forth, making it hard to predict when he will guard either side, but you can usually get a hit or two in before he switches.
Dragon Chan's special move is a flying kick. He will hop up on the turnbuckle, jump over to the other turnbuckle, jump to the floor, then finally deliver the kick. You want to duck just before he starts to deliver the kick. Throw him a jab on whatever side he's on -- a right jab if he's on the right, left if he's on the left -- then pound him with left jabs. You might get in a hook but he might dodge it.
For quick knock out, dodge any punches he throws in the initial seconds of the bout. If you can knock him down before he makes contact with you, he will stay down for a ten count.