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Agumon is a minor character and the Partner Digimon of Shinkai Haru in Digimon Universe Appli Monsters.
Agumon is a character in the monster-raising RPG "Digimon Universe", which Shinkai Haru played as a child. And it is revealed that Haru had already faced and defeated Etemon, Vamdemon and Diablomon in the game with Agumon.
In "Clash!? Gatchmon VS Agumon!", Haru's Agumon from his old "Digimon Universe" save file tries to stop the video game characters that Uratekumon has hypnotized and return them to their games of origin. He assists Haru and Gatchmon in fighting off the hypnotized final bosses that Uratekumon sends against them, and its friendship with Haru allows it to Warp Evolve to War Greymon. After the battle, Agumon comes back to the game, but promise to Haru that one day they'll meet again.
- ↑ The case of Agumon in Digimon Universe is the same of Terriermon in Digimon Tamers, a game character that has become real, so Agumon is considered partner of Haru.