|Appears in:||Digimon Universe: Appli Monsters|
Leviathan is the "Last Boss AI" that lurks in the Dark Web. It aims to control the Real World by spreading the L-Virus through Appmon, making them rampage and mess with humanity's digital communications. Cameramon works for Leviathan and reports to it that Haru Shinkai has obtained an Appli Drive. Gatchmon is so afraid of Leviathan that he freezes every time he pronounces its name. According to Gatchmon's research, reuniting the 7code Appmon might release a power strong enough to defeat Leviathan. On October 31, Leviathan directly orders Cameramon to retrieve Haru's Appli Drive. He eventually fails, and Mienumon reports her retrieval of his Appmon Chip to Leviathan at Nakamura-Fujimizaka, with Sleepmon and Sakusimon in attendance.
It is later revealed that Leviathan was part of another AI called Minerva, and that it thought about breaking the rules in order to help humanity. So, it broke free, attacked it's host, and escaped into the Net Ocean with Minerva.
Notes and references
|Digimon Universe: Appli Monsters|
|Main characters:||Haru Shinkai | Eri Karan | Torajirou Asuka | Rei Katsura|
|Appmon:||Gatchmon | Dokamon | Musimon | Hackmon|
|App Fusion partners:||Navimon and Timemon | Perorimon | Recomon | Protecmon|
|3DS characters:||Protagonist and Onmon | Naoto and Offmon | Mio|
|Antagonists:||Leviathan | Unknown Appli Driver, Cameramon, and Shotmon | Mienumon | Sakusimon | Sleepmon | Coachmon|
| Other characters:||Yuujin Oozora | Ai Kashiki | Takeru "Watson" Wato | Caught-Up Old Man | 7code Appmon | Appliyama 470 | Hajime Katsura | Den'emon Shinkai | Other characters|
|See also:||Appmon | Net Ocean | AR-Field | Appli Drive | Appmon Band | Appmon Chip | L Corp | List of episodes|