Stream anime episodes online for free, Watch Yu-Gi-Oh! GX Episode 138 English version online and free episodes. Anime Episode guide, Chapter Yu-Gi-Oh! GX Episode 138 English dubbed The Darkness is Revealed Jim and Axel come across a village under siege by the army of the Supreme King. After seeing the destruction caused by the Dark Army, Jim challenges the king, but becomes shocked when he learns who he really is. Jaden is the Supreme King.