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 Bagra Army's influence is in this zone as well. The struggle to find the zone's Code Crown begins!
Nene introduces herself to Team Xros Heart and tells them about the Code Crown, which is proof of ownership of a zone. She also informs them that the Code Crown can be used to transport to other zones, an action called Zone Transfer. Taiki then uses it to open a portal which leads his team to the Island Zone which is surrounded by an ocean. Nene disappears as mysteriously as she arrived. Once there, they save an Archelomon and ChibiKamemon from a group of Gizamon. The Bagra Army's undersea commander, Neptunmon, hears about Team Xros Heart's presence. As Team Xros Heart gather offerings for a festival, which is the key to finding the Crown Code, Neptunemon sends several Divermon to shore.
While Archelomon keeps the others hidden, Team Xros Heart heads underwater to infiltrate the sea vessel-carrying Mantaraymon and use them against each other. When Neptunmon gets word of this, he unleashes Octomon who destroys the hijacked Mantaraymon and drags everyone underwater. When ChibiKamemon sees this, he rushes over to have Taiki DigiXros him with Shoutmon X2 to form Shoutmon X2 Plus, which allows everyone to breathe underwater and give them the skill to defeat Octomon. As Shoutmon thanks ChibiKamemon for his help, Neptunmon's army has managed to kidnap Archelomon and learn the location of the Crown Code.
Starmons Type: Major Special Moves Meteor Squall Wish Upon a Star
Monitamon: "Starmons. Their techniques include making Pickmon soar through the air to hit the opponent with Meteor Squall. The more that hit you, the greater the chances that your wish will come true!" Shoutmon: "Quit acting cute!"