Dorumon (Seekers)

Dorumon is the partner Digimon of Kosuke Kisakata.

Digimon Seekers
Many years before leading the group known as the Sons of Chaos, Kosuke Kisakata lead a group hackers — with those hackers later forming the core of the SoC. Kosuke and his Hacker friends, Mindlinked to their partner Digimon, found themselves in the Gateway within the Wall Slums, looking to hack into an impenetrable firewall. It was going well but took a turn for the worst when a the system administrator discovered them which lead to the admin sending a group of gatekeeper Digimon to attack them. and Marvin Jackson defeat most of them but they are quickly replaced with more. As they had already been Mindlinking for a while, Marvin tells Kosuke he wasn't going to be able to hold off the horde for much longer. All of the hackers, sans Kosuke, had their Digimon at the Ultimate level, but even that wouldn't be enough to defeat thousands of Digimon. Kosuke declares it was time for Phase 3, and had Dorumon digivolve to the Ultimate level.

Kosuke eventually went on to create the Sons of Chaos, with Marvin and their other hacker friends becoming the bulk of the group.

When Eiji Nagasumi applies to join the Sons of Chaos he has to pass a test assigned by a member of the group to be allowed to join the group, and unusually, Tartarus, the leader of the group, partner is chosen as the one to give Eiji his test.

Tartarus waits for Eiji on top of a building in the whilst Mindlinked to Dorumon, who hides under a cloak to hide its identity. Eiji, Mindlinked within Loogamon, arrives two minutes late which causes Tartarus to dock him two points on the mission. Eiji suddenly appears next to Loogamon, which surprises even Loogamon. Eiji explains he had remembered he was told he could access commands on virtual monitors by thinking of doing it and having seen a button saying hololize simply thought of pressing it which allowed him to hololize next to Loogamon. Tartarus was also surprised and tells Eiji that his mission is to create a map of Ninth Avenue for them, and that he just has to walk around the area with the provided map tool as it would auto fill the information for him. Loogamon laughs, and informs Eiji that the mission was perfect as it had something it needed to do in Ninth Avenue anyway. Tartarus wishes Eiji luck on his mission, hoping he would be able to pass and become a member of the group.

As they watch Eiji and Loogamon leave, Dorumon tells Tartarus it was surprised Eiji was also Mindlinking to which Tartarus expresses surprise at not just that but the fact that Eiji had already shown up with his limits unlocked. It wonders if Loogamon had noticed they were also using Mindlink then asks why Tartarus had given the Demon Wolf of the Castle of Nine Wolves such an easy mission. Tartarus realizes Dorumon was right and contacts the DigiPolice, telling there where Eiji was.

When Eiji and Loogamon arrive at the Castle of Nine Wolves they are intercepted by the DigiPolice who ask to talk to him on GriMM. Turning down the request would be seen as going against the DigiPolice but Eiji had no choice in the matter as his means of communication during the mission was in the hands of Tartarus who proceeds to turn down the request.

Dorumon and Tartarus, still Mindlinked, watch in awe as Eiji and defeat the DigiPolice. After the two of them leave, Dorumon chastises Tartarus for telling the DigiPolice about Eiji, though he just muses that he was right about how powerful Loogamon was. He notices that Eiji had completed the mission having sent him the map data, and decides to accept him as an official member of the Sons of Chaos in the hopes that Eiji will be able to lead Loogamon into become an even more powerful Digimon. The wind then blows off Dorumon's cloak.

The SoC's plan to get revenge on X Nation for framing them for crimes they didn't commit by hacking into their servers and stealing their Machinedramon ends in failure after Leon Alexander and defeat them, and also kill the Machinedramon. Shortly after the failed mission Dorumon and the Hololized Tartarus, who was using a interviewer account, visit Marvin Jackson is in his room in the Sons of Chaos GrimM channel. Dorumon asks how was, with Marvin stating that it was okay but would be out of action for a while due to the injuries it had sustained at the hands of Kazuchimon. He tells Dorumon that Eiji, the hacker that Tartarus had personally scouted, had saved him and wonders if he should retire having lost that badly. Social media had become ablaze with rumours about how Judge had single handedly defeated the SoC, with the SoC themselves having leaked this information. Dorumon and Tartarus tell Marvin they would not let Judge get away with it and would get revenge against him as he poses a threat against not just the SoC but the entire. Marvin asks if the duo are going to go ahead with their plan for an all out war, with them confirming that even with the loss of Machinedramon the final piece of the puzzle had still fallen into place. They discuss Eiji and Loogamon, saying that they had only seem him digivolve to Champion and as such didn't know whether they could trust them to stick with them till the bitter end without seeing their full power. He asks Marvin if he is still dedicated seeing Tartarus's plan to the end, to which Marvin confirms he is.

Unknown Champion Form
Many years before leading the group known as the Sons of Chaos, Kosuke Kisakata lead a group hackers — with those hackers later forming the core of the SoC. Kosuke and his Hacker friends, Mindlinked to their partner Digimon, found themselves in the Gateway within the Wall Slums, looking to hack into an impenetrable firewall. It was going well but took a turn for the worst when a the system administrator discovered them which lead to the admin sending a group of gatekeeper Digimon to attack them. and Marvin Jackson defeat most of them but they are quickly replaced with more. As they had already been Mindlinking for a while, Marvin tells Kosuke he wasn't going to be able to hold off the horde for much longer. All of the hackers, sans Kosuke, had their Digimon at the Ultimate level, but even that wouldn't be enough to defeat thousands of Digimon. Kosuke declares it was time for Phase 3, and has Dorumon digivolve to the Champion level. It doesn't spend much time in that form, as it then digivolves a second time seconds later to.

DoruGreymon


DoruGreymon is Dorumon's Ultimate form.

Many years before leading the group known as the Sons of Chaos, Kosuke Kisakata lead a group hackers — with those hackers later forming the core of the SoC. Kosuke and his Hacker friends, Mindlinked to their partner Digimon, found themselves in the Gateway within the Wall Slums, looking to hack into an impenetrable firewall. It was going well but took a turn for the worst when a the system administrator discovered them which lead to the admin sending a group of gatekeeper Digimon to attack them. and Marvin Jackson defeat most of them but they are quickly replaced with more. As they had already been Mindlinking for a while, Marvin tells Kosuke he wasn't going to be able to hold off the horde for much longer. All of the hackers, sans Kosuke, had their Digimon at the Ultimate level, but even that wouldn't be enough to defeat thousands of Digimon. Kosuke declares it was time for Phase 3, and had Dorumon digivolve to the DoruGreymon. DoruGreymon charges up its Metal Meteor attack, which has Marvin realize that Kosuke wasn't playing around. He has the other hackers scatter with Megadramon and the other partner Digimon firing attacks at the gatekeeper Digimon in the air. Kosuke begins a hack, which causes all the gatekeeper Digimon to be sucked under the Metal Meteor. They try to resist but to no avail, with it landing on them and killing most of them. Marvin and the others take out the survivors but when their hacking reaches 30%, it stops. Kosuke asks what happened, with DoruGreymon telling his partner that they could only get to 30% with one Prototype Digimon. Not just that, to be able to successfully hack into the system they would need three Prototype Digimon at the Ultimate level with the three needing to consist of Vaccine, Data, and Virus Digimon. Kosuke thinks and figures out that with DoruGreymon a Data Attribute and Shuu Yulin's a Vaccine they would need one more Digimon — a Virus. The gateway had been there even before the Wall Slums themselves, which is why it required such Digimon. Beyond the gateway was the source code, and Kosuke wanted it so that he could change the World. As they muse over Kosuke's goals, one of the shows up and — knowing full well they had no chance against a member of the Royal Knights — tells everyone to flee.

Attacks
 * Metal Meteor: Fires a supermassive iron sphere more than ten times its own size, crushing the opponent in one hit.