Cherubimania

Short Summary
EmperorGreymon and MagnaGarurumon clash with Cherubimon for the last time. Cherubimon, however, quickly gains the upper hand by absorbing all the data that he stole.

Long Summary
is revealed to still be alive and Zoe, Tommy, J.P. and all encourage Koji and Takuya, making promises for what they will do once Takuya and Koji beat Cherubimon. They unified spirit evolve into and  and fly off to confront Cherubimon while the others cheer them on. They meet Cherubimon, who has formed all the data he has collected into an orb, which he consumes to make himself stronger. MagnaGarurumon begins to battle Cherubimon while EmperorGreymon powers up for a strong attack; they manage to maneuver Cherubimon into Takuya's sights and blow off the lower half of his body, but Cherubimon simply regenerates.

After a series of attacks, Cherubimon manages to knock Takuya and Koji unconscious, where Takuya has a dream. He wakes up, however, and after ensuring that Koji is unharmed, they begin to fight again. Koji notices that whenever Cherubimon is about to attack, a light comes from his forehead and deduces that it is his weak spot. Koji says that he will act as Takuya's shield, knowing that although his armor is not as strong, Takuya has a higher attack power. They proceed with their plan and although Koji eventually collapses, Takuya is able to finally to reach Cherubimon and stabs him in the head, releasing the data he collected and mortally wounding him. Takuya purifies Cherubimon who reverts back into his old good self and cries as he sees the spirits of and  and realizes what he has done before dying of the wound Takuya inflicted.

While Takuya tends to the exhausted but uninjured Koji, the data that Cherubimon had assimilated falls into the core of the Digital World. There, scoffs at Cherubimon's failure and releases his Royal Knights.