From Appmon Chip Reference Book: Rowdy by nature, fighting against strong opponents fires it up. Possessing great physical abilities as well as a sturdy fist, it always seeks for opportunities to test its power.
Anime version: I'ma punch your body in with a bam! Eri's Buddy Appmon. It has the personality of a gentle giant. An action game app Appmon. It loves Eri. It respects Gatchmon as its "Aniki".
