Andromon is a powerful Ultimate-level Cyborg Digimon who inhabits Factorial Town. The DigiDestined explore the town's factory, initially hoping that it is inhabited, but instead discover that it is completely automated. When Tai, Sora, and Joe investigate a loud crash, they find Andromon unconscious, sprawled out under some machine equipment. They try pulling him out, but a Black Gear gets embedded in Andromon's organic leg, reprogramming him into a paranoid, rage-filled attacker. Garurumon and Greymon attempt to fight Andromon, but are severely outmatched by the Ultimate-level Andromon, so Tentomon suggests that Izzy activate the program they found earlier in the factory. The program causes Tentomon to digivolve to Kabuterimon, who is able to target and destroy the Black Gear in Andromon's leg, returning him to normal. Back to normal, Andromon reveals that he is actually a very kind and helpful Digimon, and points the DigiDestined on their way. Kabuterimon's Electro Shocker.
In Fusion they are part of Splashmon's Army.