If they were fighting card to card, there’s no question who would win this round. Dark Magician has his chaos mode and even in his normal form an energy blast or two should suffice. That being said, Yugioh GX can turn any monster into a legend and Skull Knight got a whole deck of monsters to add to his disposal. Among them were powerful creatures like the Vorse Raider and the Summoned Skull. Dark Magician’s chaos mode may be stronger than any of the Skull Knight’s monsters individually, but I don’t believe that he could defeat Skull Knight’s team when they work together. Skull Knight wins.