When the Fusion Fighters regroup to figure out how to defeat Lucemon, they take the unconscious Sparrowmon with them while leaving Beelzemon behind to observe. Agreeing to Gravimon's demands, Kiriha gives up his Xros Loader in order to save Taiki's life. After introducing herself, revealing that the Digital World was broken up into Zones, Nene explains to the Fusion Fighters that a Code Crown fragment is proof of ownership of a Zone and gathering them all would allow one to rule the Digital World. Commander Sampson and his Digimon Kudamon explain to Marcus that Agumon is a wild creature that will go out of control. Lucemon then sends Shoutmon ×4 and Taiki falling after Sparrowmon saves Nene.
Though DarkKnightmon reveals his true colors in an act to absorb his brother by forcibly DigiXrossing with him. As Sparrowmon is unable to save Nene, the Phantom Mist transforms Lucemon into the mindless Lucemon Shadowlord Mode with the girl trapped in the Blazing Orb Gehanna. Eventually, the Fusion Fighters have a meeting with the princess as she turns out to be a Babamon who has fallen in loved with a shocked Jeremy. Reunited with Taiki, Shoutmon once again Digi-Fuses into Shoutmon ×4K, and despite his efforts, he starts to become weak again, with Blastmon taking advantage of the situation by ordering Bulbmon to crush the weakened Digimon. By then, the wounded Beelzebumon and Mervamon set off to find for Yuu, finding the boy before he is captured by SkullKnightmon.
About Episode — Kiriha is tricked by Gravimon into believing that Taiki is the reason he could never achieve his goal to be strong as the boy is consumed by the darkness in his heart. But, even with Nene's attempt to further convince him, Yuu refuses to believe and instead DigiXros DeadlyAxemon, all of Whispered's minions and Hell's fields' evil energy into Tuwarmon, assuming Deadly Tuwarmon Hell Mode. Evil powers play a role in turning good Digimons to a crooked one by implanting Black gears inside them, and creating havoc in the Digiworld. Lopmon later reveals that NeoVamdemon's weakness is a legendary white Lopmon. Joined by Jeremy and other Fusion Fighters, Taiki arrives and convinces Angie that she is their friend and that they still need her.
After breaking free from the spell, the enraged Shoutmon manages to digivolve to OmegaShoutmon and battles against Olegmon. However, Gravimon expected them to pull off such a plan and DigiXros his remaining forces to assume Darkness Mode while revealing that he secretly transferred his heart into Taiki's left arm during the first battle. Once Angie obtains the Code Crown, as the sun begins to rise, she makes her way to the other side of the lake where Laylamon is waiting with a defrosted Daipenmon, a frozen IceDevimon, as well as an army of Icemon. Neptunmon then knocks them into the water and has the Seadramon freeze the ocean surface to trap them! Later, as Mervamon joins Xros Heart, Kiriha reveals that he met a boy with blonde hair on his way to Zamielmon's lair causing Nene's expression to change drastically as Kiriha's description matches that of her brother. DarkKnightmon then reveals the Darkness Stone, the Code Crown that had been infused with the negative energy collected by the Death Generals. Fueled by Deckerdramon's death, the restored bond between Kiriha with Taiki and Nene creates Shoutmon ×7. However, he acts as a distraction, allowing Dracomon to flood the area while Shoutmon saves their allies.
A chaotic fight soon follows with Doumon destroyed as Yuu DigiXros Tuwarmon onto DarkKnightmon for the latter to become MusouKnightmon. With AxeKnightmon refusing to save Nene, Sparrowmon tries another attempt at Gehanna with Taiki using the Patamon DigiMemory so Shoutmon ×4 can support her. After injuring Armed MadLeomon, Shoutmon then uses the DigiXrossed Starmon and Pickmon, in the form of the Star Sword, to strike down Armed MadLeomon with a finishing blow. The next day, Taiki make their way to reach Zamielmon's lair only to discover that he expected them and reveals Ignitemon to be Mervamon's younger brother shocking everyone. Seeing this monstrous threat, Taiki, Kiriha and Nene quickly form Shoutmon ×7 to prevent both the black and white castles from being destroyed. The Fusion Fighters are then approached by the mysterious girl as she introduces herself as Nene Amano and explains the item is a Code Crown. Realizing the Disc Zone is collapsing further into a permanent state of disrepair, Taiki tries and fails to persuade Christopher to save the Zone.
Realizing that prolonging the fight might cause the caves to collapse and kill the prisoners, Taiki decides to surrender and gives AncientVolcanomon a fake Fusion Loader. Once the gateway is opened, the main Fusion Fighter members and Christopher enter the temple with Sparrowmon and the Monitamon following while Beelzemon and some of other stay behind to fight Kongoumon and his GranKuwagamon army. However, Taiki soon willing let DarkKnightmon to has his soul removed. Though the three state their distrust in Christopher after he leaves, Taiki thinks the youth is hiding something and wants to help. Kiriha is tricked by Gravimon into believing that Taiki is the reason he could never achieve his goal to be strong as the boy is consumed by the darkness in his heart.
However, the Cutemon turns out to be the fourth Death General known as Splashmon, who possesses the ability to assume any form. Like us on Facebook — About Episode — Having heard from Kiriha that he saw a boy who resembled her younger brother, Nene is eager to search for Yuu, only to find him and learn that he has been willingly helping DarkKnightmon the entire time. Tension runs high as a fight breaks out among the Xros Heart United Army with Taiki being hesitant fight back against Kiriha. With Shoutmon the only member of the Fusion Fighters not to realize the deception, Taiki explains that the surrender allows them to find the prisoners. Using Jatetsufūjinmaru Tactimon's sword, that fell into the ocean after his battle with OmegaShoutmon. While Taiki DigiFuses Pickmon Slingshot for Shoutmon and Ballistamon to use to take out the Pteramon, Angie briefly encounters Cutemon and Dorulumon before being found by Taiki and telling him to help her find a way to return to their world.
In midst of chaos, Taiki and Mervamon fall into the underground. Later on, Xros Heart learns that the Code Crowns have the power to make the wishes of those who reunite them come true, but Bagramon manages to take them all while Taiki, Akari, and Zenjirō are sent back to the human world along with Shoutmon and Tactimon. But the moment the Fusion Fighters leave for the Dust Zone, a dark energy entangles Taiki as he ends up getting separated from his teammates. However, Dorulumon soon gets separated from the others because of chasing over Ruka and encounters Cutemon, who is acting strangely. Meiko was meant to suppress the darkness within her partner Digimon.
However, the Fusion Fighters are knocked out by SlushAngemon and prepared to be executed the next day. However, the arrival of a Digimon freedom fighter named Mervamon enables the Xros Heart United Army to escape. With Jeremy caught on top of one of the shoots, Taiki attempts to save him when the mysterious boy named Christopher Aonuma appears and wants the Taiki to serve him as a member of the Blue Army. Explaining the statue is of a goddess, Reapmon offers to show Taiki the way out. However, it is soon revealed that Kiriha intends to make Yuu understand that the battle is not a game. Tension runs high as a fight breaks out among the Xros Heart United Army with Taiki being hesitant fight back against Kiriha. As Taiki goes to save Shoutmon when he risks himself to take out the explosives, they are both swallowed by KingWhamon with the Flymon following.