Later, after Devimon’s defeat, on the Eternal Continent, they are joined by Taichi's sister Hikari and her partner Tailmon, who serves as their guide to the Sealed Grounds, where Millenniummon, an ultimate weapon of the Dark Digimon, is to be revived. They are joined by Takeru Takaishi, Yamato's brother on their mission to stop Devimon, an evil Digimon who rules the Cloud Continent. Omnimon is able to defeat Nidhoggmon (Eyesmon’s Mega form) before the countdown to annihilate the real Tokyo in the Real World happens. They are lured into a fake Tokyo dimension where Eyesmon, another opponent attacks them. While getting ready for summer camp, Taichi Yagami, Yamato Ishida, Sora Takenouchi, Koushiro Izumi, Mimi Tachikawa and Joe Kido are transported to the Digital World where they acquire Digivices and Digimon partners while learning that they have been chosen to stop the Dark Digimon causing attacks both the Network and the Digital World. They meet up with Yamato and his partner Gabumon and together they defeat the Mega Argomon as Omnimon. Taichi, a young boy gets transported to the internet and meets Agumon while they are attacked by a swarm of Argomon. In the year 2020, a series of cyber-attacks across Tokyo are the result of catastrophic events in another world within the internet, the Digital World, where creatures called Digimon roam. See also: List of Digimon Adventure (2020 TV series) episodes

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