|Jafar says: Read my lips and come to grips with the reality!|
It was voiced by Takashi Matsuyama in the Japanese version.
It was born from Digi-Eggs in August 2020. When Koshiro informs him that a horde of Digimon called Argomon are responsible for the chaos with Taichi and Agumon battling them to save the former’s family. Though the remaining In-Training Argomon digivolves into it Champion form. Agumon Digivolves to Greymon and fights the Champion Argomon. Although the Champion Argomon seems to almost have the upper hand, Greymon still manages to defeat it. However, the Argomon still exist and manage to take control of the United States Military System, and launched a missle. Koshiro and Garurumon suddenly appear to warn Taichi and Greymon that the missle will destroy their world unless they defeat the Argomon. They manage to find the Rookie Argomon, who turns out to be the leader of the In-Training Argomon. Greymon and Garurumon manage to fight them off, while they fight the Rookie Argomon. After defeating the Rookie Argomon with their combined attacks, and the In-Training Argomon were destroyed as well. However, the Rookie Argomon digivolved to it Ultimate form and fights back. It seems to have the upper hand of Koshiro and Garurumon, but Taichi and Greymon recuses them and combined their attacks to defeat the Ultimate Argomon. However, having survived that attack, the Ultimate Argomon manages to Digivolve to its Mega form.
Argomon almost defeats Greymon and Garurumon, but DNA digivolved to Omnimon. Omnimon and the Mega Argomon engage in a brutal fight, but Omnimon succeeds to destroy the Mega Argomon, and deactivate the missle.
Later on, several Baby Argomon invade the network along with Calmaramon to sabotage the ship’s control. Izzy soon recognizes the same Argomon In-Training that Taichi and Agumon fought before. Sora, Joe, Mimi, and Izzy’s partner Digimon manage to defeat Calmaramon and the Baby Argomon, while Zudomon destroys the obelisk, turning the ship’s control back to normal.
The In-Training Argomon, Champion Argomon, and Ultimate Argomon are set to return in episode 57 to confront Tai and Agumon.
It had a five different forms. Its In-Training form is a one-eyed green octopus creature with two purple tentacles. It has a single eye and rabbit like ears. In its Rookie form, it resembles a purple one-eyed octopus creature with two green ball-like fists. In its Champion form, it resembles a bigger purple rabbit-eared octopus creature with two metal hands with three fingers on each hand. It's mouth is hidden in its four-eyed face. In its Ultimate form, it resembles similar to its Worm Phase form but lacks the humanoid version unlike in Digimon Savers. In its Mega form, it has the same appearance as the one in Savers.
- Acid Bubbles
- Brute Knuckle
- It's similar to another Digimon Villain, Diaboromon.