The Vagrant War Demon, Rebellimon

Summary
Tai and Agumon continue on their journey separate from the other DigiDestined when they find themselves surrounded by Giromon after rescuing a Cutemon from them. Just as it appears that MetalGreymon will have to fight the Giromon, the battle is joined by the deadly Rebellimon, who easily tears through the Giromon until only one is left, which flees for its life when Rebellimon fires his machineguns at it, before Rebellimon turns his attention to MetalGreymon. However, something in Rebellimon's memory causes him to call of the fight, asking they stay away from him before he departs. Cutemon takes Tai and Agumon back to his home before explaining recent events in the region regarding bad Digimon, turf wars, and then Rebellimon arriving to challenge powerful Digimon to combat, and still fighting even after he is beaten.

Soon, Rebellimon is challenged by the surviving Giromon, having brought several Boarmon to attack Rebellimon, only for Tai and Greymon to arrive to assist. When one Boarmon corners Tai, Greymon overpowers the one that pinned him and takes it out before dealing with the one that threatened Tai with a well-timed Nova Blast. When all the Boarmon are deleted, the Giromon flees once more. Cutemon heals up Agumon's injury, before Tai inquires as to if Rebellimon has a reason for his fighting. However, they are soon engaged by the very same Boltmon that defeated Rebellimon previously. Due to being a Mega Digimon, Boltmon easily overpowers Rebellimon with little trouble, before moving in to finish him off, even as Cutemon tries to protect him. When Cutemon is about to be crushed by Boltmon's foot, Rebellimon recovers and saves him, and when Cutemon is able to heal Rebellimon's injuries, he is able to fight back against Boltmon, using a missile to stun Boltmon so he is struck by his own axe flying back at him, slicing his chest open to expose his core, before Rebellimon then uses his fist to destroy Boltmon's arm, then his core, defeating and deleting the Mega.

Afterwards, Rebellimon decides to take his leave, but asks Cutemon to join him. After they depart, Tai and Agumon seem to recognize Rebellimon's voice, but believe it couldn't be, though the metal ring on Rebellimon's horn indicates it is the very same Ogremon they met previously.