Awakened
Berserk Mode is an Ability that Yuto, Yugo and Yuya possess. This causes their other dimensional self to go into a state of rage, which causes one of the dimensional selves' eyes to go red. it first appeared in Episode 37, when Yuto and Yugo dueled. This was caused after Yuto Xyz Summoned his Dark Rebellion Xyz Dragon when Yugo's Clear Wing Synchro Dragon was also in play which then both of them caused to make their eyes' glow (Yuto Purple while Yugo's was green). After being reminded that he didn't want to hurt anyone by Yuya, Yuto comes out of beserk mode then loses to Yugo a moment later. After Yuto is defeated, Yugo comes out of beserk mode not knowing what had happened.
Later in his duel against Isao Kachidoki, Yuto appeared in Yuya's mind and the two merged causing Yuya to enter Berserk Mode and use Yuto's Dark Rebellion Xyz Dragon.
