Yugi could win Kaiba by Black Paladin. In fact, he won the monster in Kaiba's mind or his hate. Joey was proud of himself that he was a part of Yugi's victory. Without Red Eyes Black Dragon, Yugi would have lost. Anyway, Kaiba still didn't believe in friendship power. He believed only in future. Thus, Joey challenged Kaiba to have a duel with him to prove that. They played this game outside Duel Tower on ground of Alcatraz.
Kaiba started first. He summoned a monster and faced down 2 cards. He was going to use his professional technique, virus. Turn to Joey, he summoned Gear Freed and attacked Kaiba's monster. Then Kaiba opened a card that decreased halp of attack power of his monster. His monster had attack power below 1,000 points. When Gear Freed destroyed the monstter, virus trap card activated. This card could be activated with monster having attack power below 1,000 only. So Joey couldn't summon any monsters having attack power more than, 1,500 any more. Then Kaiba could summon another monster and attack directly Joey. His LP was 2,200. At his turn, Joey summoned Lanstar Warrior and combining with Angel's Dice. Lanstar Warrior was power up destroyed Kaiba's monster. Kaiba had LP 2,800 left. Yugi really believed in Joey's strength as a real duelist.
On the other side, Tea having Malik's spirit separted her friends and went to see Isis. He realized everything he had done with Istar family and would like to get rid of a shadow Malik himself. Then he, in Tea's body, ran to see him at the duel battle on the top of Duel Tower.