Digimon Universe: App Monsters

The Character I've Raised is Naked!? Roleplaymon's School Dungeon! (1x3)

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After gaining a new ally that can fuse with Gatchmon into the more powerful DoGatchmon and driving away Cameramon, an agent of the evil artificial intelligence "Leviathan", Haru pursues an Appmon that intends to transform the city's systems into a Role Playing Game.