|Human Partner||Matsuda Takato|
|Voice Actor||Nozawa Masako (野沢 雅子)|
|Perfect||Megalo Growmon |
Black Megalo Growmon
Dukemon (with Matsuda Takato)
Dukemon: Crimson Mode (with Matsuda Takato and Grani)
Guilmon is very naive, but he is friendly.
Guilmon was originally created as a result of Takato's notes on his design being scanned by the D-Ark, which manipulated data with the help of the DigiGnomes, creating Guilmon. Takato's D-Ark lead him to where Guilmon had realized and the two became partners.
Although Takato sometimes mistrusted Guilmon, the two got along and managed to defeat several Digimon. Although Guilmon was almost beaten in the fight against Devidramon, Takato's strong feelings towards him allowed him to evolve into Growmon and defeat Devidramon.
Later, Takato and Guilmon faced Mihiramon, one of the Twelve Deva and a powerful Perfect level. Growmon was defeated in one attack by Mihiramon and Takato admitted that he didn't want Guilmon to fight. The two have a heart to heart moment, which leads to Takato getting a Blue Card and Evolving Growmon into Megalo Growmon, who defeats Mihiramon easily.
Guilmon continued to fight in battles against the Deva, personally defeating Sandiramon, Sinduramon (although this was because Sinduramon was blasted into a lake and was electrocuted), Indramon and Vikaralamon.
When the Tamers went to the Digital World to recover Culumon, Guilmon and Takato's friendship was somewhat strained when Takato discovers Guilmon's origins. This leads up to their fight against Beelzebumon, who effortlessly overwhelms all of the Tamer's Digimon and deletes Leomon, loading his data. Takato's bloodlust and rage resulting from this unleash Guilmon's Digital Hazard, which Guilmon is very concerned about Takato's rage and force evolving him into Megidramon.
Although Megidramon at first has the upper hand, Beelzebumon effortlessly defeats him after loading the data of Makuramon, who came to scold him for being such a failure. Takato kneels by Megidramon and realizes that he was too worried about controlling Guilmon, that he didn't understand what would happen if he couldn't control himself. This leads to an epiphany which breaks the Dark Evolution. Guilmon only manifests Megidramon's power once more after this, in the form of Megidramon's tail deflecting Beelzebumon's bullets, which were fired during the epiphany.
As Guilmon prepares to fight Beelzebumon, Takato wishes they could fight together, as Beelzebumon wouldn't stand a chance. Guilmon tells him to wish for it and Takato's wish for them to fight together Matrix Evolves them into Dukemon, who proceeds to defeat Beelzebumon, deleting the Deva Chatsuramon along the way. Although Dukemon could destroy Beelzebumon, he spares him.
When the Tamers face Zhuqiaomon, Guilmon is about to be destroyed by Zhuqiaomon's powerful Blazing Helix, but Takato Matrix Evolves with him into Dukemon and fights Zhuqiaomon until Qinglongmon breaks up the fighting.
During the battles against the D-Reaper, Guilmon and Takato continuously Matrix Evolve into Dukemon, but are never able to fully defeat the D-Reaper. In the end, they are forced to run away to Okinawa to escape it. However, with motivation from Takato's cousin Kai, they decide to go back and fight.
Thanks to the Red Card, they are able to fight inside the D-Reaper, but thanks to all of the powerful Agents, they become overwhelmed and Dukemon starts to delete after being attacked by the Agent 01. However, Grani gives his power to Dukemon, forcing a Mode Change into Dukemon Crimson Mode.
Dukemon appears in the Super Digica Taisen card game.