Stream anime episodes online for free. Watch Yu-Gi-Oh! GX Episode 120 English version online and free episodes. Anime Episode guide, Chapter Yu-Gi-Oh! GX Episode 120 English dubbed Inter-Dimension Detention Following Jaden and Professor Viper’s duel, Duel Academy and all its students have been transported to another world! After getting down from the helicopter pad, A Harpie Lady appears and attacks Crowler and Bonaparte! Jesse takes care of them before heading inside the school. Jaden and the others gather all the students into the gym and try to decide what to do. Adrian returns and says he saw someone crossing the desert. They head outside and find Bastion being attacked by Harpie Lady. Jesse begins to fight her again, but then she becomes Harpie Lady Sisters and starts to beat down Sapphire Pegasus. Meanwhile Adrian has taken the Devil Arm into the library for some reason. The arm then escapes and sets its sites on Marcel.