Bonnie was getting closer to Ash, Scarlet, and Zeraora. She was determined to help them. Clemont was running after her, but collapsed halfway. Team Nova was getting ready to launch their attacks and Bonnie knew that she and Squishy wouldn't get there in time, but she tried her hardest to. She turned to Mewtwo and said, "Mewtwo go ahead of us and buy us some time." Mewtwo nodded and flew ahead of Bonnie and Zygarde. Mewtwo managed to get there in time. The attacks were launched and Mewtwo used its Psychic attack to turn the attacks against its opponents. Ash had just finished untying Scarlet when Mewtwo saved them. Scarlet said, "Mewtwo you're here!" Mewtwo replied, "Everyone else is here too and we're going to help you." Scarlet and Ash smiled at each other and they now could fight their way out of their situation. Serena and Calem were making their way to Ash and Scarlet, but they saw Zygarde run past them and Serena saw a familiar face riding Zygarde. Serena gasped and yelled, "Bonnie?!" Bonnie only briefly looked at Serena, but she kept looking forward and she was almost to Ash and Scarlet. Mewtwo saw that Bonnie and Zygarde were almost there. Zeraora also saw Bonnie coming. So when Team Nova was about to attack again, Zeraora used Plasma Fist to buy Bonnie and Zygarde more time.
Bonnie and Zygarde saw the Plasma Fist and Bonnie said, "Faster Zygarde! They can't hold off Team Nova for long!" Zygarde replied, "Don't worry Bonnie I've got friends on the way and they'll help us fight against Team Nova. But yes I will go faster." Zygarde sped up. Calem's father and the rest of Team were struggling to get up and fight. Zeraora was powerful, but its power alone couldn't stop them. Before the members of Team Nova got back up, Bonnie and Zygarde jumped right over them. They landed right in front of Zeraora, Mewtwo, Ash, and Scarlet. Scarlet and Ash both gasped and said in unison, "Bonnie?!" Then Macy gasped, "That girl! She's recovered?!" Team Nova was now back their feet and were ready to fight, but Bonnie jumped off Zygarde and called out, "Zygarde, use dragon pulse!" Squishy listened to Bonnie and launched the attack. Most of Team Nova, including Calem's father, were severely injured from the attack. They were knocked multiple feet away.
Meanwhile, Grace and the others caught up to Calem and Serena. Grace said, "Serena! Thank goodness that you're alright!" Serena responded, "I'm fine, but it's Ash and Scarlet I'm worried about." Grace looked towards Ash and Scarlet's position. She saw Bonnie standing next to Zygarde, Mewtwo levitating on Zygarde's other side, and Zeraora standing next to Mewtwo. Gary attempted to run towards Ash and Scarlet, but Grace held him back. Gary exclaimed, "What are you doing?!" Grace replied, "It's too risky to run out there without a plan. Ash and Scarlet will be fine. We need to come up with a plan first before we jump into action." Gary growled, but he didn't speak. He wanted to help his friends, but Grace was right. Without a plan, he wouldn't be of any help. He looked over to Ash and Scarlet hoping that one of them had a plan.
Team Nova began getting up slowly. Scarlet exclaimed, "They're so persistent!" Ash said to her, "That can be applied to us you know." Scarlet questioned, "How can you make a joke at a time like this?!" Ash just nervously chuckled and scratched the back of his head, but then he had an idea. He stared towards the defense mechanism. Scarlet saw him stare at it and she responded, "Ash tell me you're not planning to activate that thing." Ash replied, "I am actually." She continued, "But Ash that's giving Calem's father what he wants!" Ash negated, "No I'm not giving him what he wants. I want to activate it and use it against him. I want to use it properly." That's when Scarlet finally understood why Ash was planning to activate the defense mechanism. He would use it the way it was supposed to be used. She then turned to him ready to help him and concluded, "Then I'll help you get over there." Ash smiled and the two siblings began to put their plan into motion.
Gary saw that Ash and Scarlet were hatching a plan, but it was unknown on what that plan was. Calem and Serena both stared at each other noticing that Ash and Scarlet seemed to have some kind of plan in mind. Grace was curious about what Ash and Scarlet were planning. But then Grace and everyone around her became shocked when the siblings' plan was revealed by what they did next.
Ash began running towards the defense mechanism and Scarlet transformed into the scarlet phoenix. She attacked Team Nova making sure they focused on her and not on Ash. Macy grew furious and sent out a Gyarados. She had Gyarados use hydro pump. The hydro pump hit her directly and the phoenix let out a screech of pain, but Scarlet ignored that pain. She unleashed her full power. The eyes of the phoenix flashed a deeper red color. Then the fiery bird became surrounded in multiple layers of red fire. Then Scarlet swooped down towards Gyarados and she launched the strongest attack of the scarlet phoenix. The attack landed a direct hit on Gyarados and it fainted. Macy and all of Team Nova were shocked at the power the scarlet phoenix had. Gary and everyone else were astonished at Scarlet's power. Ash had seen Scarlet's attack and he was proud, but also concerned. He had seen the anger and rage within Scarlet and he was worried on how much she was going to let out. Ash finally reached the defense mechanism and he asked Pikachu to send Scarlet the signal so she would know to stop. When Scarlet saw the thunderbolt she flew over to the defense mechanism and joined her brother. Calem's father saw that Ash was standing next to the defense mechanism and he said, "So you finally see it my way and have no choice, but to activate it." Ash replied, "That's where you're wrong! I'm not activating it for your selfish desires! I'm activating for the reason it was created: To protect all people and Pokemon threats like you!"
Grace and everyone around her saw that Ash was going to activate the defense mechanism. Gary was confused on why he was doing it. He said, "Is he crazy?! He's going to destroy the Kalos region!" Grace then replied, "No he's not! That only happens if he's forced to do it! He's activating willingly which means Ash is going to defeat the threat to the region!" Serena then questioned, "Is there any possibility that this might be a self sacrifice?" Grace answered, "No if he was being forced to do it then yes it would be, but since he's doing it willingly Ash will actually survive. He might fall unconscious and be completely drained of energy, but other than that he'll be fine." Serena let out a relieved sigh. Calem saw Ash look directly at him. Calem nodded to him. Ash got the message and got ready to activate the defense mechanism.
Ash placed his hand on the symbol. Zygarde, Mewtwo, and Zeraora gathered near Ash and Scarlet. Then Xerneas and Yveltal appeared and gathered with them. The defense mechanism started up and began gathering the energy of the legendary Pokemon of Kalos. Then the Team Nova members scrambled away from the siblings, but Calem's father was more furious then ever. He sent out all of his Pokemon. Calem ran forward and joined Ash and Scarlet and he called out his Charizard. He mega evolved his Charizard. It turned black, its fire was blue, its eyes were red, its wings were shaped differently, and it had spikes on its shoulders. Then Calem commanded, "Use Blast Burn!" Charizard used blast burn and all of his father's Pokemon were knocked out. Calem's father shouted with rage, "How could you Calem?! How could you side with them?! You can't deny that I'm your father!" Calem responded, "I hardly know anything about you! I joined you to learn more about you! But now that I see who you really are, I think it's safe to say that I don't have a father! A father wouldn't kill his son's mother just to force him to live with him! You were never my father! And I'm ashamed to call you my father! I never want to see you again!" The defense mechanism launched a beam and it hit Calem's father directly. Calem's father was forever trapped inside a crystal and it was sent to the underground chambers of the temple. Then the defense mechanism shut off after Ash removed his hand. He collapsed to the ground and became unconscious. Scarlet saw how exhausted her brother was so she sat beside him and waited for him to wake up. And when he woke up the battle would finally be over.