What happens in Yu-Gi-Oh GX season 4?

Answer 1

Yuki Judai/Jaden Yuki becomes an adult with the help from Yubel that is fused in his soul. This also means that he has a more serious attiude towards dueling and his friends. On the first episode of forth season Judai trys to leave Duel Academy because he believes that all his adventures hurt his friends. But is convinced by Saiou/Saitorious and Kagemaru to stay. Judai also faces a new threat, Darkness.Judai is now being forced to duel many times against Mr. T which is on of Darkness people. Judai meets up with Johan(Jeese Anderson) later to help him. With the help from Yubel Judai is now able to summon E-HERO Neos (Elemental Hero Neos) with his duel disk and make him come to real life (not as a virtual 3-D hologram). Judai adds a duel monster sprirt Honest into his soul as Mr. T wants to distroy him. Marufuji Sho(Syrus Truesdale), Manjyome Jun(Chazz Princeton), Rei(Blair Flanngon) are now in Obelisk Blue Dorm. Manyome defeats Edo Phoenix(Aster Phoenix) in Duel Monsters. Judai finds the missing Bloo-D(Destiny Hero Plasma) card for Edo. Judai remains in the Slifer Red dorm by himself. Asuka Tenjoin(Alexis Rhodes) & Judai tag battle against Tome(shop keeper) and Chancellor Sheppard. Judai meets up with Saiou(Saitorious) and Kagemaru. O'Brien returns in GX. Hell Kaiser Ryo(Zane Truesdale) is starting to have heart problems, Kaiser is then put in a wheelchair. Kaiser duels against a Psycho Shocker deck (Jinzo) deck. Sho is then foreced to take over 1 week from this day using his brother's deck and getting electricuted. Judai defeats Darkness and saves the world. Sho, Manjyome, Asuka and Judai graduate for Duel Academy. In the last two episodes Judai vs The King of Games,Yuki Muto but loses. Then after that he go's on his own adventures.

In the final 2 episodes of Yugioh GX

Ep 179: Judai VS The Legendary Duelist (Part 1)

Ep 180: Judai VS The Legendary Duelist (Part 2) - Final Episode