The Fusion Fighters and Blue Flare must protect King Whamon and the Island Zone's Code Crown from Neptunemon's Seadramon army.
With his Seadramon army surrounding King Whamon, Neptunemon demands the Fusion Fighters relinquish the Island ZoneCode Crown and the DigiCards. Though the others suggest him to use a Zone Transfer to escape, Mikey points outs that Archelomon is held hostage and that Neptunemon would focus his frustrations on him and the rest of the Island Zone residents. Before Mikey can give up the Code Crown, Christopher arrives on MailBirdramon and takes out some of the Seadramon, having learned of his progress from Nene while defeating an Ookuwamon. Christopher offers to help out more in return for the DigiCards, but Mikey thanks him for his help and turns him down. After using the MarineAngemon DigiCard to have Neptunemon and the remaining Seadramon distracted, Mikey forms Shoutmon X2 so they and Jeremy with the Rare Star Sword can reach Archelomon via a bridge of Syakomon. Coming out of the trance as Archelomon is freed, Neptunemon knocks him and the Fusion Fighters into the water before ordering the Seadramon to freeze it over to trap them. Luckily, as the Bagra Army's actions were interfering with his rest and relaxation, Dorulumon arrives and attacks Neptunemon before freeing the others. From there, Mikey then digifusesShoutmon, Ballistamon, and Dorulumon with the Star Sword to create Shoutmon X4. Shoutmon X4 ends up fighting against Neptunemon's King's Bite trident which is bent on piercing him. Using that to their advantage, Mikey has Shoutmon X4 grab Neptunemon so he would be mortally wounded by his weapon. Neptunemon's final maneuver is to unleash a shockwave that breaks the surrounding ice to take everyone down with him. However, King Whamon secures those on him and jumps high enough to evade the breaking ice while scooping the rest that were pushed underwater into his mouth. As the Fusion Fighters celebrate their victory, with Chibitortomon joining their group, Christopher and MailBirdramon leave with the former explaining that he'll let Mikey gather Code Crowns to make easy for him to obtain. Mikey is unable to convince Dorulumon to join the Fusion Fighters, while Tactimon is livid over the turn of events.
(Numbers indicate order of appearance. Bolded characters are fought by the protagonists, and italicized characters appear only as a voice or silhouette.)
Monitamon: "Cutemon. Techniques include... um... cutely showing off his cuteness in the cutest way possible so people fall in love with his cutitity! How much more time do I have? Uh... Oh, boy! Did I, um, mention that it's cute? I mean... uh... just look at that face!" Shoutmon: "You're making all that up, aren't you?!" Monitamon: "Pretty much..."
Cutemon Type: Fairy Special Moves ? ? ?
Monitamon: "Cutemon. His techniques include...er...uhm...Getting others to fall hopelessly in love with that cute face, I guess. Ah, love~" Shoutmon: "You just improvised that explanation, didn't you!"