him and protect him. Yubel was driven insane by the Light of Destruction and wishes to fuse all dimensions together so she could always be with Jaden. Seeing that Yubel was just trying to fulfil her promise, Jaden decides to use "Super Polymerization" and fuse himself with Yubel to help fulfil that promise and cleanse her of her corruption. In the fourth year, Jaden returns to Duel Academy for his final year. Since he fused himself with Yubel, he has gained her powers as well as her bi-chromatic eyes when he uses her powers. However, since he came back from the alternate dimension, he has become more solitary and distant from his friends as he does not wish to cause trouble for anyone anymore. He also lost his happy-go-lucky personality and his love for duelling; having endured such horrors over the past three years at Duel Academy, his belief that one duels for fun and enjoy yourself has been sapped out of him, and he only duels for survival. Despite this, Jaden is confronted by Nightshroud, the same spirit that possessed Atticus back in his first year, who tells Jaden that he will engulf this world in darkness by feeding off the negative emotions of humanity. Jaden originally fights off his minions until he comes face to face with Nightshroud himself. He duels him and successfully defeats him, freeing everyone of their darkness. Over the year, Jaden had slowly grown closer to his friends once again and began to reclaim his love for duelling, but on his final night, Jaden is going to leave the academy without saying goodbye. He is then stopped by an adult Yugi Mutou who transports him back in time for his 'graduation match' against Yugi Mutou from the past. During this duel, Jaden reflects on his time at Duel Academy and the great friendships he has made along the way. He expresses his gratitude towards Yugi and officially reclaims his old personality and, spurred on by the opportunity to battle one of Yugi's Egyptian God cards (in this case, Slifer the Sky Dragon), his love of duelling once again. Production Yu-Gi-Oh! GX is produced by Nihon Ad Systems and TV Tokyo, and the animation is handled by Studio Gallop. The series was directed by Hatsuki Tsuji and scripts were prepared by an alternating lineup of writers–Shin Yoshida, Atsushi Maekawa, Akemi Omode, Yasuyuki Suzuki–with music arrangements