Stream anime episodes online for free. Watch Yu-Gi-Oh! GX Episode 21 English version online and free episodes. Anime Episode guide, Chapter Yu-Gi-Oh! GX Episode 21 English dubbed The Duel Off (1) A friendly duel is to occur between students from Jaden’s academy and from North school. Zane recommends Jaden who Crowler hates of course and chooses Baston. They agree to have the two duel to decide who should represent the academy. They fight as friends and rivals alike. The situation turns against Jaden when Baston prevents him from using Polymerization . Meanwhile, an old man confronts Alexis at the dorm about the story of students disappearing at the dorm.