Digimon Fusion

The story begins with a seventh-grade boy named Taiki Kudō dreaming of commanding a Digimon army. The next day, Taiki spots a red creature flickering in static and hears a mysterious voice which presents him with a Xros Loader, into which the creature is absorbed. He and his friends, Akari Hinomoto and Zenjirō Tsurugi, are then sucked into a portal to the Digital World, where they are attacked by MadLeomon and his troops. The group is rescued by Ballistamon, Starmon, the Pickmon, and the mysterious red creature: Shoutmon. After Taiki and his Digimon companions fight back against MadLeomon and his troops, MadLeomon absorbs some Chikurimon, Troopmon, and Mammothmon to become Armed MadLeomon. Taiki uses his Xros Loader to allow Shoutmon and Ballistamon to DigiXros into a more powerful form. 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 kids go with Shoutmon to his home, Village of Smiles, where they are thrown a party. Soon after Taiki decides to try to leave the Digital World and return home since he accidentally dragged Akari and Zenjirou with him, causing Shoutmon to become upset. The humans and digimon go their separate ways but MadLeomon attacks the kids once more, combining with Orochimon. Shoutmon comes to their rescue and with the help of Taiki to DigiXros, becomes Shoutmon X2 and defeats MadLeomon, causing the evil digimon to retreat. Nene is seen watching Kiriha and Taiki individually, evaluating their fighting skills.

The Village of Smiles is suffering from the threat of the event known as "Day of Rising Ground." The human boy known as Kiriha appears and informs Taiki and the others about what is happening, offering his help but only if Taiki joins his side and serves under him. He mentions something about the "Code Crown" as well. Refused, Kiriha uses DigiXros on MailBirdramon and a Golemon to fight Shoutmon and his friends. However MadLeomon's forces decide to attack the village as well...

The mysterious and beautiful girl known as Nene explains to Taiki and the others about the Code Crown. It is revealed that what they have is but a fragment of a larger piece and that there is a fragment for every Zone. Using the fragment's power to do a Zone Transfer, Taiki's Xros Heart army ends up in the Island Zone, surrounded by a vast ocean. However they quickly find out that this is not an island paradise as the Bagura Army's influence is in this zone as well.

Captured by Neptunemon, Archelomon is forced to give up the whereabouts of the Code Crown. In order to protect the Code Crown, Taiki and the others head into the stomach of a gigantic Digimon, Whamon. There, the group, as well as the Bagura Army, wage battle inside Whamon. Later, they find DigiMemories of legendary digimon under Whamon, and using them, they summoned legendary digimon Leviamon.

Teams Xros Heart and Blue Flare must protect KingWhamon and the Island Zone's Code Crown from Neptunemon's Seadramon army. Taiki realizes that a DigiMemory can only be used once and summons the memory of MarineAngemon to fight off the Seadramon army. They then take on Neptunmon himself....