Thanks to Omnimon’s reappearance, the Mega Digimon Nidhoggmon, was finally defeated. However, Sora and the others disappeared after being swallowed by a storm. Tai and Matt, who are left behind in the Digital World sneak into Bulbmon.
(Numbers indicate order of appearance. Bolded characters are fought by the protagonist(s), and italicized characters feature non-explicitly, e.g. voice, silhouette, image.)