With some help from Lilymon and Dracomon, Taiki manages to get Kiriha away from Dorbickmon's attack. T aiki Kudō, a 7th grade boy, heard a mysterious melody and followed it to an alley where a mysterious, legendary Digivice called the Xros Loader appeared in front of him. Meanwhile, Laylamon is at a gate that opens to reveal a gigantic Digimon. Needing to get her some help, Mikey Kudo, Angie Hinomoto, and Jeremy Tsurgi decide to take Nene to the Monitamons' home in the Warrior Zone. In an attempt to take out both Christopher and Taiki, as well as to destroy what remains of the Disc Zone, Blastmon unleashes Bulbmon. As the battles take off, Twilight and Whispered's followers battle Shoutmon ×5, Beelzebumon and Mervamon while Kiriha has Cyberdramon attack Whispered and Sethmon.
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. As Beelzemon takes his leave, bent on making them suffer, a furious Laylamon sends the Fusion Fighters flying into one of the worst Digital Zones. Taken by Shoutmon to see the Village of Light, Taiki and his friends encounter Jijimon and learn of the Bagra Army before the village is being bombed by a Pteramon. As Lalyamon arrives and is enraged to find Arukadhimon defeated, Wisemon joins the Fusion Fighters as they arrive to the Warrior Zone where they are greeted by a clan of Monitamon. 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. Plot : It's been six years since that summer adventure when Taichi Yagami and the rest of the DigiDestined crossed over to the Digital World. Once at a bridge, Blastmon catches up but is more focused on getting the treasure than deposing of the Fusion Fighters compared to his forces after he accidentally pummels off the bridge.
Takuya and Kouji's Ultimate Evolution! ChibiTortomon retrieves a box containing the DigiCards with Taiki summoning Leviamon to literally disarm Ebidramon so Shoutmon ×2 can destroy him. After the defeat of all Death Generals, Taiki and the others head to the Bagra Army's Headquarters, Pandemonia. However, Taiki is strange book and meets its occupant Wisemon who attempted to dissect him before convincing the Digimon not to. Safely placing the allies into his Xros Loader, Taiki forms Shoutmon ×5B to fight Dorbickmon but was defeated by Dorbickmon's power. However, it is no regular battle as the victory falls to the group that managed to kill the opposing team's General.
Once they find Karatenmon, the Monitamon Elder explains to the Fusion Fighters that he will only give up the Code Crown to whoever can make him laugh. Realizing the truth behind the facade, Taiki picks himself up and defeats Yuu while convincing that what DarkKnightmon said was nothing but lies. Taiki uses his Xros Loader to DigiXros Shoutmon and Ballistamon into an incomplete Shoutmon ×3. Shakkoumon is revealed to be the electoral administrator who has been watching Lucemon to see if he was worthy of the presidency As Sparrowmon is unable to save Nene Amano, the Phantom Mist transforms Lucemon into the mindless Lucemon Shadowlord Mode with the Nene trapped in the Blazing Orb named Gehanna. Before Dorbickmon can destroy Taiki and others, Nene shows up and uses a plant-like smokescreen before retrieving the rest out of harm. 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. Luckily, aacepted as a Warrior of Light, Reapmon reincarnates into Beelzemon and helps Shoutmon ×4K in defeating HiMachinedramon.
The Fusion Fighters arrive in the Magma Zone and decide to take a dip in the hot springs before they are ambushed by an army of RedMeramon under SkullMeramon and his aide BlueMeramon. Using Syakomon and her kin as a bridge, Shoutmon ×2 carries Taiki and Jeremy toward Neptunmon with the latter using the Rare Star Sword to free Archelomon. However, he acts as a distraction, allowing Dracomon to flood the area while Shoutmon saves their allies. When Taiki attempts to talk Dorulumon into joining the Fusion Fighters, Cutemon reveals that he traveled with him to look for his parents after his home town was raided by the Bagra Army. Afterwards, advising him to let the red Monitamon join his group so they can be in touch, Nene gives Taiki the Warrior Zone Code Crown while explaining that she will be a full-time member once she finds her brother.
The group is rescued by Ballistamon, Starmon, the Pickmon, and the mysterious red creature: Shoutmon. However, revealing the presence of other humans and getting upset with Angie while admitting his reasons for Taiki to stay, Shoutmon ends up screwing things up as Taiki ends their friendship and heads into the forest with his friends the next morning. This places the Fusion Fighters in a situation. However, while traveling between the zones, the Fusion Fighters are attacked by the legendary Arukadhimon. In order to save them, Xros Heart enters the Sweet Zone and persuaded the group of Monzaemon which they encountered that Akari is the best patissiere in the Digital World. However, the Fusion Fighters are knocked out by SlushAngemon and prepared to be executed the next day. When Sparrowmon manages to penetrate the blazing orb, she is grabbed by Lucemon just as she almost reached Nene before she is saved by Shoutmon ×4 who covers her.
In the final battle, Yū's Darkness Loader turned into a yellow Xros Loader for his use. From there, Splashmon captures Nene and assumes her form into tricking Taiki, Shoutmon, and Ballistamon into a death trap. Lopmon later reveals that NeoVamdemon's weakness is a legendary white Lopmon. The next day, after begging Kiriha to have him save Ballistamon, Shoutmon has Kiriha save Nene and Taiki while telling the latter to DigiXros him with DarkVolumon in order to reach him. Arriving in the Lake Zone, Taiki and his friends find a group of frozen Digimon before hearing a voice calling out. Before he died, Dorbickmon warned that they will never defeat the remaining Death Generals.
. Reapmon engages Shoutmon ×4 before Blastmon unleashes an attack After Reapmon was fatally wounded by Laylamon, he and Shoutmon ×4 were unable to reach Mikey. This site does not store any files on its server. However, after sealing Shoutmon ×7, Whispered starts to collect energy to execute an attack that would destroy the Bright Land. The voice eventually respond to his words leading them to it, revealed to be the DigiMemory of Omegamon.
Though Dracomon and Mervamon free him, Shoutmon ×7 fail to hold the attack off. Later that night, as Tai and Matt try to console Sora, they are suddenly attacked by Machinedramon, whose attack disperses the DigiDestined and Digimon across the Digital World. Neptunmon uses Archelomon as ransom for the Code Crown and DigiCards. Taiki's group tries to save her, only to be stopped in their tracks by a Digimon named Ignitemon, who weakens the group's Digimon under orders from Zamielmon Bagramon's third Death General. 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. With Christopher taking his leave, admitting not to comfortable with her cuddling, Beastmon names Taiki her champion before he collapses from exhaustion.