The National Duel Circuit is tournament held in Heartland where Shark, IV, and other Duelists participated, appearing in Yu-Gi-Oh! ZEXAL.

It is known that Shark and IV would face each other for the tournament's finals. However, IV intentionally put his Deck on top of a pot, so that it would fall and end up scattered on the floor in the break room when Shark passed by it. By this way, Shark was disqualified right before unleashing his winning move because he "saw" IV's Deck before the Duel. Therefore, IV was considered the winner of the tournament.

Participants

• IV
• Reginald Kastle
• Other Duelists