Jaden and Ryuga ' s Duel Jaden and Ryuga ' s Duel is a Duel between Jaden Yuki and Mr . Ryuga in the " Yu - Gi - Oh ! GX " manga . Events . Prior events . As part of his application to become a teacher at Duel Academy , Mr . Ryuga needed to defeat 50 students . However using the electromagnetic ray in his ring , Ryuga was able to stop his opponents ' cards from functioning properly , while his own Duel Disk was equipped with a shield from the ray . He would also take one of his opponent ' s cards as a prize whenever he won . Ryuga researched some students ' Decks , including Jaden ' s and learned about Jaden ' s reliance on using Spell Card s to strengthen and fuse weaker monsters . While Syrus was Dueling Ryuga , Jaden heard from Alexis that Ryuga had won at least forty - five straight Duels and that there was a rumor about him stealing cards from his opponents . Jaden met Syrus after his Duel and learned that the rumors were true as Syrus had one of his cards taken . Disgusted Jaden went to confront Ryuga over this . Having won forty - nine Duels , Ryuga met Jaden outside Crowler ' s office . Jaden outlined his disapproval and called Ryuga a disgrace . Hearing the noise outside , Crowler came out of his office and choose Jaden to be Ryuga ' s fiftieth opponent . The Duel . The first four turns of the Duel are not shown . At some point during the fifth turn , Jaden had 4000 Life Points , control led " Elemental Hero Sparkman " ( ATK : 1600 ) and " Elemental Hero Wildheart " ( ATK : 1500 ) and " Hero Barrier " face - down in his Spell & Trap Card Zone , while Ryuga controlled an unnamed Dinosaur . Jaden attack ed and destroy ed Ryuga ' s Dinosaur with " Wildheart " ( Ryuga : 3250 Life Points ) . Ryuga Summon ed " Don Turtle " ( ATK : 1100 ) and used " Ultra Evolution Pill " , Tributing it to Special Summon " Cyber Dinosaur " ( ATK : 2500 ) . " Cyber Dinosaur " attacked and destroyed " Wildheart " ( Jaden : 4000 → 3000 Life Points ) . Ryuga Set " Smashing Ground " in his Spell & Trap Card Zone . Jaden ' s hand contained " Polymerization " , " Elemental Hero Woodsman " , " Elemental Hero Ocean " and two other cards . Jaden attempted to use " Polymerization " , but Ryuga used his ring to jam Jaden ' s Spell Cards . Alexis , Chazz and Syrus noticed something was wrong with Jaden . Syrus wondered if Jaden was having difficulty activating a Spell Card , that he had when he Dueled Ryuga earlier . Crowler blamed Jaden for neglecting to maintain his equipment . Jaden switched " Sparkman " to Defense Position ( DEF : 1400 ) and Summoned " Ocean " in Defense Position ( DEF : 1200 ) . Ryuga Summoned " Hyper Hammerhead " ( ATK : 1500 ) and used " Smashing Ground " to destroy " Sparkman " . " Hyper Hammerhead " attacked " Ocean " , but Jaden used " Hero Barrier " to negate the attack . Ryuga sacrificed " Hyper Hammerhead " so that " Cyber Dinosaur " could attack directly ( Jaden : 3000 → 500 ) . Jaden wondered if him playing frisbee with his Duel Disk the day before was what was preventing it from accepting Spell Cards . Thinking about how the legendary duelists ; Yugi , Kaiba , Jonouchi and Mai never gave up , Jaden refused to back down . Jaden drew " Alternate Fusion " . Jaden Summoned " Elemental Hero Woodsman " ( ATK : 1000 ) and Set " Alternate Fusion " , " Shield Strike " and " Swamp of the Fallen " in his Spell & Trap Card Zone . Ryuga attacked " Woodsman " with " Cyber Dinosaur " . However Jaden used " Swamp of the Fallen " to halve the ATK of Cyber Dinosaur " ( ATK : 2500 → 1250 ) and " Alternate Fusion " to send " Woodsman " and " Ocean " to the Graveyard to Fusion Summon " Elemental Hero Terra Firma " . " Terra Firma " and " Cyber Dinosaur " battled , destroying " Cyber Dinosaur " ( Ryuga : 3250 → 2000 Life Points ) . Jaden then used " Shield Strike " to inflict damage to Ryuga equal to the DEF of " Terra Firma " ( Ryuga : 2000 → 0 Life Points ) , winning the Duel for Jaden . Aftermath . Ryuga ' s ring was damaged after losing the Duel . Having not won his fity Duels , Ryuga was not admitted as a teacher .