World Duel Carnival The World Duel Carnival was a Duel tournament held in Heartland City in the " Yu - Gi - Oh ! ZEXAL " anime . Purpose . The World Duel Carnival is really a plan designed by Mr . Heartland and Dr . Faker to find Number holder s so that Kite Tenjo can hunt them more efficiently . If the latter wins the tournament , they will gather most of the " Number " cards . Unfortunately , Kite was defeated in his Duel with Vetrix due to his " " , but Dr . Faker still allows the tournament to go as planned because the Sphere Field has the power to take " Numbers " from any holder regardless of the winner or loser . The effect still remains the same due to Vetrix taking Kite ' s numbers from him . Others besides Dr . Faker and Mr . Heartland who know or at least suspect the real purpose of this tournament such as Vetrix and Astral are also using it to collect " Numbers " . Organization . Monitoring . Dextra and Nistro are acting as referees of the tournament and punish Duelists who cheated . However , their true task is the search of " Number " cards , much like the Battle City tournament was used to search for Egyptian God monsters . They are also involved in investigated incidents during the tournament and may decide whether something is allowed , as was the case with Tombo Tillbitty ' s Basket Rule s . If they discover someone cheated , they have authority to decide what kind of punishment the person will get , even if said punishment would be a physical one . For example , Nistro forced a boy into a Duel and ordered him to disappear from Heartland City . Next , he made Flip eat all his " Heart Piece " candies and bound him with a rope . Nistro threatened he would confiscate his deck , while Flip would be disqualified and deprived from all future participation in the tournaments for the rest of his life . Additionally , he claimed he would make sure Flip never Dueled again by beating him out of Heartland City . Special rules . Having their own special rules in a Duel is not allowed . However , such rules can be approved by the referee , as was the case with Tombo Tillbitty ' s Basket Rule . Flow of the tournament . Preliminaries . The preliminaries happen for three days in Heartland City , and each Duelist must accept all challenges . The tournament has an ante rule of betting their Heart Piece s and if all pieces are lost , the participant will be automatically disqualified . In order to enter the finals , the Duelist must gather five correct Heart Pieces to make a perfect heart . The tournament begun with more than 10 , 000 participants . Only 24 Duelists were able to complete their Heart Pieces . Trey was a finalist but could not participate in the semi - finals due to him being in a coma after being defeated by Yuma and Astral , therefore only 23 Duelists advanced to the finals . Finals . First Stage . The first stage of the finals is called SkyScape section known as the Park Section in the Japanese version , which occurs all throughout Heartland . The Duelists use the Duel Coaster system which works similarly to a Battle Royal Duel . The Duelists ride the Duel Coaster and Duel if another Duelist is on the same lane . Multiple Duelists can Duel against the same opponent and several parts of the lanes have Spell / Trap Card s set which activate when the Duelist crosses over them . Those who remain from the 23 finalists will pass to the next course of the Duel Coaster which is the underground section called Dragon ' s Den . Second Stage . The second stage consists of one - on - one battles , which happen in special fields : magma , space , jungle , and canyon . There seem to be beneficial uses with these fields as some Duelists , such as Dextra and Quattro , state that they can put their opponents at disadvantages with these locations . Whatever value of Life Points each player had at the end of the Duel Coaster becomes their starting Life Points for the quarterfinals match - ups . The Duel Field s are treated as Field Spell Card s and provide various effect s which affect both Duelist s . Finalists in each field < br > Jungle - Vetrix vs Dextra < br > Magma - Reginald Kastle vs Quattro < br > Space - Kite Tenjo vs Quinton < br > Canyon - Nistro vs Yuma Tsukumo < br > Semi - Finals . The semifinals of the World Duel Carnival take place on the Duel Tower that ' s situated inside the Duel Stadium . Finals . The finals continue on the top of Duel Tower where both finalists Duel in the Sphere Field . It is part of Dr . Faker ' s plan to draw out the power of " Number s " . Prize . The winner will get a lifetime free passport to Heartland and the title of Duel Champion . Additionally , Mr . Heartland will fulfill one wish from the winner , if possible within his power . Participants . Over 10 , 000 Duelists participated in the tournament . Of them , 23 qualified for the finals . 15 were eliminated from the finals via the Duel Coaster . Eight Duelists made their way to the second stage , where six of them were eliminated . Anna Kaboom was not a finalist as she didn ' t have a complete heart , but she forcibly took the place of another finalist . Unofficial Participants . This Duelist Dueled someone who was participating in the WDC . His opponent was under the impression that he was involved in the tournament until after the Duel , when he revealed he possessed no Heart Pieces .