The [[World Duel Carnival]] finals begin on the [[Duel Coaster]]. [[Yuma Tsukumo|Yuma]] forgets his [[Heart Piece]], but his [[Kari Tsukumo|sister]] and [[Super Secret Number Card Investigation Club|friends]] bring it to him in time. [[Nistro]], [[Reginald Kastle|Shark]], [[Quattro]] and [[Quinton]] all defeat their opponents, while the Duel Coaster system reveals its set-up. Yuma is then cornered by the [[Triad of Terror]].
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