As the Mamodo numbers finally reduced to ten, the truth regarding the King Festival and the power to reshape the world finally became known to the remaining combatants. However, the instructions could not tell them that one of these final ten Mamodo would desire the ultimate annihilation of all the Mamodo and their world. He is the Mamodo known as Clear Note, a child who does not care for his own people and would rather destroy his world and all in it if he wins the tournament. The intentions of Clear were already known to his rival, the scarlet-scaled dragon Ashuron, and he chose to fight time and again with him to prevent this dream from becoming reality. But as powerful as Clear was, he was still limited in certain abilities and required the assistance of another Mamodo to help him fight. As the Mamodo numbers started dwindling, Clear made his move in going after other Mamodo. But Ashuron, now with Zatch by his side, was ready for this and tried to cut him off to prevent him from accomplishing anything. Although he appeared to stop Clear and deliver a painful blow at the cost of his own book, the evil opponent decided to go into hiding, giving everyone a ten-month warning before he would be powerful enough to crush anyone without any interventions or assistance.
Over the ten month period, Clear healed his wounds as he evolved his own powers to a new level. In preparation, Zatch and his allies began their own training regimen of their own, focusing on their own strengths and improvements to eliminate this enemy. During this period, several more Mamodo were eliminated, including Kanchomé, who had been a major ally of Zatch throughout the tournament, and Gomu, the beetle Mamodo helping Clear. With their removal, the number of remaining Mamodo had been reduced down to 5: Zatch, Brago, Tia, Ponygon, and Clear Note himself. After the ten months were up, the now transformed Clear creates a special battleground in the Rocky Mountains of North America, awaiting the final battle to determine the next Mamodo King. Clear Note revealed his trump cards, his "right hand" and "left hand" spell. His left hand spell, Sin Kuria Senuosu Baadorerugo, was defeated several times by Ponygon. His right hand spell, a giant cannon, was blocked several times by Tia. Yet even though the spells were stopped, the damage was done to Zatch's allies: Tia was forced to go back after blocking the final attack of the cannon while Ponygon was sent back for his own safety after nearly exhausting himself in saving Zatch and taking him to Clear's battlefield. Zatch and Kiyo arrive at the battlefield seeing Sherry and Brago already fighting him. Brago fights off Clear using many new powerful spells, but Clear begins to overwhelm him. However, Zatch shows up and they use a combination of their powerful spells to overwhelm Clear. Clear Note decides to use the "true power of Shin" by activating Shin Kurea Seonosu once again. While initially stopped by a combination of Zatch's and Brago's most powerful spells (Baou Zakeruga and Shin Baberuga Gravidon), Clear merges with his most powerful spell and easily crushes both of them and their spells.
As Zatch and Brago's power wore away and Clear appeared to finally have the battle at hand, Zatch's book miraculously changed to a golden color. With this new book, he began to gain the abilities of all the Mamodo he had befriended throughout the tournament, upgraded by way of the book to allow all of them to use their most powerful spells. With the combined power of friendship and Zatch and Kiyo's determination, Clear's Seonosu's body began to wear away and he escaped high into space above the Earth in a last ditch effort to destroy it. Using combined assistance of spells from Tia, Kolulu and Ponygon and the power of every other Mamodo, Zatch and Kiyo released their full power in the form of Shin Burawan Baou Zakeruga, which annihilated Clear's perfect form and burned his book, bringing the crisis of the evil Mamodo to a close, and opening the way to the King Festival's final battle between Zatch and Brago. Zatch and Brago's final battle was very difficult for both fighters until a final confrontation between Zatch's Baou Zakeruga and Brago's Shin Baberuga Gravidon. Although Brago uses his strongest spell to stop the attack, his defense of Sherry forces them to lose their book, making Zatch the winner and the new Mamodo king.