Arc League Championship The Arc League Championship , known as Maiami Championship in the Japanese version , is a Duel ing competition in the " Yu - Gi - Oh ! ARC - V " anime . The event is sponsored by Leo Corporation and is managed by the " Paradise City Duelist Association " . The tournament is divided into three categories : " Youth " ( Junior in the Japanese version ) , " Junior Youth " and " Senior " ( Youth in the Japanese version ) , based on the contestant ' s age . Taking part in this tournament is the first step towards becoming a Professional Duelist . Purpose . The Arc League Championship is a cover up plan designed by Declan Akaba . According to him , the tournament is actually an exam to select Duelists whom are strong enough to battle against his father , Leo Akaba . Additionally , according to Declan , the upcoming Battle Royal Junior Youth finals has an alternative motive as well . That is to stop the upcoming Fusion Dimension invasion . In addition , the Top 8 of the Senior finals were more specifically deployed to Duel Duel Academy Duelists . Requirements . To qualify for the championship , a Duelist must either have : Tournament Format . For the start of the tournament , Duelists were required to put their tournament ID ' s into their Duel Disk . A computer would then match that registered Duelist to another opponent . These two Duelists would have a match and the victor would advance to the next round . In the first round , there were 32 matches for the Junior Youth division . In the second round , there are supposed to be 16 matches for the Junior Youth Division . However , one was defaulted after Dipper was sealed into a card by Celina . Final 16 of Junior Youth . The final 16 Duelists are engaged in a Battle Royal around Paradise City using Quartet of Quandry as the Action Field . The Duelists will also be able to find Pendulum Monster s around the city to assist them in their Duels . Similar to Duelist Kingdom and Battle City , Duelists must find at least two Pendulum Monster Cards to Duel against other opponents and wager them . Duelists participate in individual Duels , which can merge into Tag Duels . If a Duelist forcibly joins an already - existing Duel , they receive a 2000 damage penalty for intrusion . The winner will take the losing opponent ' s Pendulum Monster Cards and move on to the next opponent . The top 8 Duelists with the most Pendulum Monster Cards will move onto the next round . The Battle Royal will last for 24 hours . The Battle Royal began at midday with all Duelists leaving the stadium to Duel . Cancellation . The surviving participants of the Junior Youth Division were Nagi , Taka , Moon Shadow , Dennis McField , Gong Strong , Yuya Sakaki , Shay Obsidian and Zuzu Boyle . Rather than playing the Battle Royal as expected , they instead fended off an invasion of Standard Dimension by the Fusion Dimension that sealed the other eight participants into cards . Sora sealed Sun Shadow , Yuri sealed Halil and Olga , while the Obelisk Force sealed Ashley , Carl , Bram , Reed Pepper and Trout . Nagi and Taka Dueled Yugo , but were defeated by him off - screen . Additionally , while Zuzu survived , she was transported with Yugo to the Synchro Dimension due to her bracelet and initially assumed by the other contestants to have been sealed in a card as well . After the Battle Royal ended , Henrietta and Declan officially canceled the Arc League Championship to reveal to the public the existence of the Fusion Dimension invaders as well as the Lancers . Recreation . When the Four Dimensions were seperated again , Declan sent out invitations to Yuya , Gong , Sylvio , and Moon Shadow to participate in the Arc League Championship , though he kept Moon Shadow ' s identity and place in the tournament a secret bar only that there was a fourth Duelist participating . The tournament started with the four Duelists Dueling in a Battle Royal within Paradise City , in an attempt to reawaken the Lancers memories and have Yuya ' s Duel make Riley , who was turned into a baby after sealing Zarc , smile again . Yuya eventually won , and was about to be promoted from Junior Youth to Senior , but Declan intervened . He explained that the Battle Royal was supposed to be a continuation of the Arc League Championship that had been interrupted by Duel Academy ' s attack . Declan thus sent Yuya to defeat the Duelists who had still remained after the attack and that he had chosen as Lancers , explaining that only one of them could advance to the Senior class .