25화: 요가 하오가 자신의 쌍둥이 형제임을 밝혀내어 친구들과 부모들을 충격에 빠뜨린다

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Yoh confesses that Hao is not only his predecessor but also his twin brother. This shocks most of his friends while his parents remember how they failed to kill the recently born Hao. Yoh's grandfather trained him in order to have him defeat his twin in the future. (Source: Wikipedia)