Koichi Kimura

Koichi Kimura (木村 輝一) is the final main character in the Digimon Frontier (Anime). He is one of the "DigiDestined", children who were chosen to receive the ability to transform into Digimon in order to save the Digital World, and he is also known as one of the Legendary Warriors, inheritors of the Spirits of the Ten Legendary Warriors. He was originally brainwashed by the fallen Cherubimon to serve as one of his evil Warriors. Koichi's first appearance is that of the antagonist Duskmon, wielder of the Spirits of Darkness and one of Cherubimon's servants. Once freed of this control, he fights alongside the DigiDestined.

Background
Koichi is Koji Minamoto's identical twin brother, and the elder of the two twins. What day they were born is completely unknown. Their parents had divorced each other when they were very young, and neither twin could remember the other. His mother never told him about his little brother, and Koichi only learned about Koji when his grandmother told him on her deathbed as she died from a natural cause. Koichi, feeling that his mother had enough to worry about, didn't tell her that he knew about his twin brother. After finding out where he lived, Koichi started to periodically watch Koji and his folks, while yearning to meet his little brother, but was never able to bring himself to interrupt the seemingly happy family.

Overtime, deep in his heart, Koichi began to grow bitter that their father had abandoned him and their mother, who Koichi worried for as she worked long, hard hours despite the fact that she was unwell. On the same day that the rest of the DigiDestined were eventually gathered and brought to the Digital World, he decided he would meet Koji, and followed him to the train station. Koichi found himself running to catch up with Koji, but he lost his footing and fell down a flight of stairs, collapsing as a result. He woke up in an isolated sector in the Digital World where he met Cherubimon, who, after sensing the sadness and darkness that resided in his heart, enticed him to join his cause. He erased Koichi's memories and gave him the corrupted Human Spirit of Darkness to give him a semi physical form as Duskmon.

Personality
Koichi is a reserved boy with a kind heart, who wants to do the right thing but is prone to burying his problems in his heart. He is very gentle, somewhat quiet and is good at following people without them noticing him. Within him, however, is also a great potential for darkness, born from his resentment of his twin. Cherubimon uses this darkness to great effect, but Koichi overcomes this through his love for his brother. After being free from Cherubimon's control by Koji and Takuya, he had slight depression but snapped out of it after realizing and accepting that the powers of darkness didn't have to be evil if he chose not to use them evilly, which enabled him to wield the newly purified Spirits of Darkness, enabling him to fight alongside the other digidestined.

As the evil Duskmon, he is cold and aloof. He doesn't interact with the other members of his team, who can at the very least work together to a shared goal, and he sees only the value that they can bring. He is also single minded loyal to Cherubimon, though much of that is due to Cherubimon's influence.

Appearance
Koichi has dark blue eyes, and black hair that is parted to the sides of his face. He wears grey pants with a red long sleeved shirt under a short-sleeved green button-up that is left open, and green sneakers with yellow streaks. He wears a blue cap in the Human World, but he loses it upon his transition into the Digital World. He has a grey and black D-Tector.

Digimon Forms
As Duskmon, Koichi has no memory of his past until he almost killed Koji during their first two confrontations. Hearing Koji's name being said over and over gave Duskmon great pain. After this, Duskmon fought Koji in order to learn the connection between them. Cherubimon gave him his Beast Spirit to become Velgemon but Ophanimon restored Koichi's memories, freeing him from his Spirits' control, but not from the influence of Cherubimon. It wasn't until Koji purified the defeated Duskmon that Koichi was free from Cherubimon's control.

After realizing that darkness does not equate to evil, Koichi transforms his Spirits into the Spirits of Darkness without evil, with which he channels AncientSphinxmon's true power.

Duskmon
Duskmon is Koichi's initial Human Hybrid form which he undertakes with the corrupted H Spirit of Darkness. Duskmon is coldly rational and overwhelming in his power, wielding his "Blut Evolution" (Deu: Blood Evolution) swords with enough power to match even Fusion Hybrid Digimon.

After traveling to the Digital World, Koichi is manipulated into becoming Duskmon, who serves as Cherubimon's loyal servant. Duskmon is the strongest of Cherubimon's minions, able to take the full force of the DigiDestined's combined strength. Duskmon's greatest weakness is Koichi's connection to Koji; though this, his subservience to Cherubimon is discarded in favor of an unrelenting search for the truth, which ultimately allows Duskmon to be defeated. Through Koichi's conviction, Duskmon is purified into Loweemon.

Attacks
 * Deadly Gaze (Geist Abend, Deu: Ghost Evening): Projects energy beams from his hands and the assorted eyeballs on his body.
 * Gedächtnisstörung (Deu: Memory Disturbance): Shifts through the memories of his target.
 * Lunar Plasma (Eroberung, Deu: Conquest): Raises and lowers his swords forming a red moon and then rushes at his enemy, slicing them.
 * Brute Strike (Blut Strike, Deu: Blood Strike): Charges his foe with the "Blut Evolution" swords.
 * Death Gaze
 * Ghost Move: Teleports toward his foes.
 * Geist Blade Storm (Eroberung Storm, Deu: Conquest Storm): Slashes the area around him with the power of his "Lunar Plasma" technique.

Velgemon
Velgemon is Koichi's initial Beast Hybrid form, undertaken when he slide evolves using the B Spirit of Darkness. Velgemon sacrifices Duskmon's rational thought for flight and an even greater power.

In an attempt to cement his control over his Warrior, Cherubimon gives Duskmon the B Spirit of Darkness to become this ferocious beast. Added to the already powerful Duskmon, Velgemon is powerful enough to defeat even BeoWolfmon. It takes the combined power of both BeoWolfmon and Aldamon to defeat Velgemon for good, reverting him back to Koichi and free from Cherubimon's control. Through Koichi's conviction, Velgemon is purified into JagerLoweemon.

Attacks
 * Dark Obliteration (Zone Deleter): Draws a circle on the ground then a ball forms destroying anything in it.
 * Dark Vortex (Master of Darkness): Fires a laser from his middle eye.

Loweemon
Loweemon is Koichi's second Human Hybrid form which he undertakes with the purified L Spirit of Darkness. Loweemon is powerful but flexible, wielding the "Danzai no Yari" (断罪の槍? lit. "Spear of Conviction") and "Shokuzai no Tate" (贖罪の盾? lit. "Shield of Atonement").

Koichi first becomes Loweemon when he purifies the Spirits of Darkness upon confronting Cherubimon. He uses this newfound power to defeat Cherubimon's shade with the true power of darkness. Loweemon becomes Koichi's default battle form, only turning into JagerLoweemon when strictly necessary. He doesn't spend too long fighting as Loweemon, however, as he gives his Spirits to Koji for Unified Spirit Evolution to MagnaGarurumon, one of the only Digimon strong enough to face their new foes. Koichi ultimately gives up his Spirits, including his ability to become Loweemon, when he sacrifices himself to protect against Lucemon's attack. Koichi leaves the Spirits of Darkness much changed from their original state. When AncientSphinxmon reawakens, he does so in Loweemon's form.

Attacks
 * Shadow Meteor (Endlich Meteor, Deu: Final Meteor): Gathers energy in the jaws of the lion head on his chest and releases a burst of energy.
 * Shadow Lance (Ewig Schlaf, Deu: Eternal Sleep): Raises his spear, spinning it and gathering momentum and then dashes forward, thrusting his spear forward.

JagerLoweenmon
JagerLoweenmon is Koichi's second Beast Hybrid form which he undertakes when he spirit evolves using the purified K Spirit of Darkness. JagerLoweemon offsets Loweemon's skill and weaponry for more power, though only as a last resort. Koichi never spirit evolves into this form directly.

Koichi first becomes JagerLoweemon when he purifies the Spirits of Darkness upon confronting Cherubimon. He uses this newfound power to defeat Cherubimon's shade with the true power of darkness. JagerLoweemon only appears when Koichi is in dire straits, often as a finishing blow, though he loses the ability to become JagerLoweemon when he gives his Spirits to Koji to become MagnaGarurumon. Koichi ultimately gives up his Spirits, including his ability to become Loweemon, when he sacrifices himself to protect against Lucemon's attack.

Attacks
 * Ebony Blast (Schwarz Donner, Deu: Black Thunder): Releases a burst of dark energy as the pistons on his back recoil and can continue releasing bursts.
 * Dark Master (Schwarz König, Deu: Black King): Leaps forward as the gems on his body glow and unleashes a giant burst of dark energy in the shape of a black lion, slicing straight through his enemies.

Ancident Sphinxmon
Ancident Sphinxmon now lives on in Koichi, who wields the Spirits of Darkness he created. His consciousness eventually takes the form of Loweemon at the end of the DigiDestined's journey, giving them the support necessary to stand up and fight even in the face of Lucemon's incredible power. Now Loweemon, he joins with the DigiDestined in becoming Susanoomon. After saving the DigiDestined from Lucemon Larva's final attack, Loweemon and the other Legendary Warriors take the core blade of the ZERO-ARMS: Orochi, return to their human Spirit forms, and strike down Lucemon once and for all. As the DigiDestined are flung back to their world, Loweemon contacts them one last time and tells them that Koichi is still alive.

Attacks
 * Dark Blast: Fires a laser beam alongside a roar.

Rhihimon
Rhihimon is Koichi's Fusion Hybrid form.

Koichi never attains this form is any animation or game, but it does appear as a toy. The Hybrid-Digivolving Figures: Loweemon and Hybrid-Digivolving Figures: KaiserLeomon toys are molded over Koichi bases, and can be combined into Rhihimon for a sort of Fusion Evolution.

Digimon Frontier (Anime)
Traveling towards the Rose Morning Star, the group is thrown out of their Trailmon outside the Continent of Darkness as the Trailmon is afraid of it and even Bokomon doesn't have any information on it. In the darkness, everything is initially scary to the group, but after they find out everything is actually not so bad, they cheer up. At the same time, Cherubimon's Evil Legendary Warriors are visited by Cherubimon himself and they turn over the Fractal Code they have collected, except for Seraphimon's. Cherubimon is aware of this, but allows Mercurymon to keep it for now and sends Arbormon to destroy the kids. Duskmon confronts Mercurymon who he has figured out wants to rule himself and is using the others to do his dirty work until the right time comes to strike. Duskmon considers getting involved in the fights for once. Arbormon suddenly attacks the group, destroying some nearby Pipismon and evolving into Petaldramon. The kids Beast Spirit evolve, but Petaldramon eats a tree and grows to giant size, becoming more than a match for the group. Finally, with some teamwork, they manage to overpower Petaldramon and a combined attack from BurningGreymon and Zephyrmon finishes him. Lobomon gets his Beast Spirit and they give Arbormon the chance to surrender. However, Duskmon shows up and destroys Arbormon as he is now useless without his Beast Spirit and prepares to confront the Legendary Warriors himself.

Duskmon defeats all Legendary Warriors with most in their Beast Spirit forms so they decide to regroup and plan out their attack. Takuya gets cocky and believes they are unstoppable despite Koji's warnings. In the battle that follows, Takuya as Agunimon tries to restrain Duskmon and allow the others in their Beast forms to defeat them, but the attack fails. Agunimon is nearly killed, but KendoGarurumon leaps in and takes the blow and is seriously wounded. Seeing Koji badly hurt, Duskmon screams out in anguish and releases a dark cloud. Despondent, Takuya hops on a Trailmon and returns home.

Feeling sad, Takuya returns home but finds himself in the past on the day he first came to the Digital World. Due to his broken spirit, he returns as a Digimon, Flamemon and is haunted by an image of Duskmon. Realizing he has a chance to change his destiny and believing the others will be better without him, Takuya follows his past self to try to convince him not to get on the Trailmon. While following himself, he spots a boy who looks like and is following Koji, but doesn't investigate. Given the chance to stop himself, Takuya realizes his friends and the Digital World needs him and screams at himself to go. He regains his spirit and destroys the image of Duskmon that has been haunting him. Dark Trailmon returns and offers Takuya a ride back to the Digital World but warns that it will be a one-way trip. Takuya accepts this and returns to the Digital World, evolving back into Agunimon on the way.

Takuya returns to the digital world as Agunimon but finds only a crater where the last battle with Duskmon took place and no sign of the others. Eventually he finds and rescues Bokomon and Neemon from a Sepikmon who is trying to make friends in the wrong way and learns that all but Koji have been captured by Mercurymon and Ranamon. As a gesture of friendship, Sepkimon uses his boomerang to guide the three to their friends who are being tickle tortured to give up their Spirits. Koji evolves to Lobomon to free them, but is no match for Ranamon and Mercurymon. Agunimon arrives and with his senses sharpened so that he can sense changes in the weather, he picks the perfect opportunity and saves his friends. Amplifying their various powers with that of a storm that rages, the group drives off Mercurymon and Ranamon and Takuya is hailed as a hero for his rescue of them with the group noticing his changes. However, Mercurymon claims to have a new plan that will defeat them.

In the Thunder Sphere, Takuya is confronted by Parrotmon. Takuya quickly evolves to Agunimon and effortlessly destroys Parrotmon.

Realizing that Takuya and Koji are still stuck inside Sakkakumon, J.P., Zoe and Tommy spirit evolve and try to break back in, but are unsuccessful. However, Duskmon, wanting to find out why he reacted to Koji's pain as he did, manages to break into the Darkness Sphere to confront Koji. Realizing he's in trouble, the group tries to contact Takuya and Koji through their D-Tectors and manage to get through to Takuya. They explain that he is stuck inside Sakkakumon, the Beast Warrior of Steel and that the only way out is to defeat the opponents he comes across, but that Koji is in trouble. Takuya faces off against IceLeomon in the Ice Sphere and manages to destroy him as Agunimon after a fight, but chooses to look for Koji rather than escape.

In the Darkness Sphere, Duskmon confronts Koji and shifts through his memories of his life, learning that Koji's mother is dead and that he is distant from his step-mother. On the day he entered the Digital World, he was buying flowers for his step-mother to try to make it up to her when Ophanimon contacted him. Koji realizes just how mean he is to her and swears that when he returns to the human world he will make it up to her. Koji evolves to Lobomon and then KendoGarurumon but is unable to defeat Duskmon and is defeated. Before Duskmon can kill him, Serpahimon's Digi-Egg reacts and gives him the power to Fusion Evolve into Beowolfmon who is a match for Duskmon. During the fight, both of their true forms are briefly revealed and its shown that Duskmon is actually the boy who looks like Koji that Takuya had briefly seen on his return to the human world. Their fight causes an explosion that blows them out of Sakkakumon just before Agunimon reaches them.

Making his way through Sakkakumon, Agunimon enters the Steel Sphere where he is confronted by a manifestation of Mercurymon himself. In the Steel Sphere which is Mercurymon's element and with Mercurymon able to reflect attacks and manifest himself in any mirror, Agunimon is no match for him and follows him to the Light Sphere where Mercurymon is keeping Seraphimon's Fractal Code. Mercurymon uses the Fractal Code to evolve into ShadowSeraphimon and easily defeats both Agunimon and BurningGreymon. As the others desperately try to get back in again, Bokomon's pleas cause Seraphimon's Digi-Egg to give Takuya the power to Fusion Evolve to Aldamon. As Aldamon, Takuya is more than a match for ShadowSeraphimon and he retrieves Seraphimon's Fractal Code and returns it to his Digi-Egg. Aldamon follows Mercurymon back to the Steel Sphere where he easily defeats him and collects the Human Spirit of Steel, though Mercurymon survives in the form of Sakkakumon. Exiting Sakkakumon, Takuya reunites with the others in time for Serpahimon's egg to hatch as Patamon.

As Duskmon and Beowolfmon continue to fight, Patamon leads the rest of the gang to Koji but Cherubimon traps them. Eventually they manage to escape by digging their way out. As Duskmon is losing, Cherubimon intervenes and gives him the Beast Spirit of Darkness, allowing him to evolve into Velgemon. Velgemon is more than a match for Beowolfmon and defeats him, with Koji barley escaping an attack that would've killed him. Before Velgemon can finish him off, Ophanimon intervenes through Koji's D-Tector and reminds Velgemon of his life in the human world: he is actually Koji's long-lost twin brother Koichi who found out he had a brother not long before from his dying grandmother. He followed Koji to the train station but missed the elevator and ended up falling down the stairs before somehow ending up in the Digital World. Confused, Velgemon flies off, leaving Koji alone.

After the gang finally get back together again Koji decides to run off after Duskmon to find out their connection and Takuya chases after him. Instead of waiting for Takuya to return with Koji, J.P. decides to look for a Digimon that knows something about the Rose Morning Star and in a Trailmon Graveyard, they find a dying Trailmon named Angler who claims to know something but holds it over their heads to force them to do things for him. Eventually he confesses that he just wants friends and they happily help him though they don't actually believe he knows anything. Angler apparently dies, but is instead renewed. Angered at being tricked, the group Beast Spirit evolve to beat him up, but decide that Angler is too pathetic to bother with. Giving them a ride to find the others, Angler reveals what he knows: shortly after the battle between the three Celestial Digimon, Angler was forced by the Evil Legendary Warriors to carry a container to a castle at the Rose Morning Star. Given the timing, Angler always believed it contained either Ophanimon or Seraphimon. The group realizes it has to be Ophanimon as Seraphimon is now Patamon and are excited as they are now close to the Rose Morning Star and finally meeting Ophanimon in person.

As he now knows Koji is his brother, Duskmon doesn't want to fight him anymore, but Cherubimon takes advantage of his restored memories to prey on Duskmon's anger at Koji and his father for abandoning their mother who is sick and has to work hard to increase his control over him. Duskmon confronts Koji as Beowolfmon and finally reveals the truth to Koji, that he is his twin brother. Duskmon defeats Beowolfmon and as Velgemon nearly kills Koji, but Takuya saves his life. While Patamon distracts Velgemon, Koji reveals what he has learned to Takuya who insists a reluctant Koji fight as he is the only chance his brother has. Koji refuses so Takuya evolves to Aldamon to fight on his own, but is no match for Velgemon. Koji finally steps up to fight, evolving to Beowolfmon and teaming with Aldamon against Velgemon. Aldamon manages to weaken Velgemon with an attack, allowing Beowolfmon to finally defeat him. Koji purifies the Spirits of Darkness, releasing Koichi just as the others catch up to them on Angler. Takuya is shocked as he recognizes Koichi from his brief return home.

Koichi is released from the form of Velgemon and explains that he is Koji's twin and his backstory. Out of guilt for what he has done, Koichi remains distant from the group as they travel on Angler to the Rose Morning Star. On the way, Cherubimon attacks and Aldamon, Beowolfmon, Beetlemon, Korikakumon and Zephyrmon are unable to defeat him and are defeated themselves. Cherubimon offers Koichi the chance to rejoin him, explaining that the Spirits of Darkness chose him because of the darkness in his heart after rejecting many other Digimon. Koichi refuses to let darkness control him anymore, causing him to get a D-Tector and the Spirits of Darkness to become the true Spirits of Darkness. Evolving to Loweemon and JagerLoweemon, Koichi proves more than a match for Cherubimon and destroys him, but it turns out to just be a projection, not the real Cherubimon who promises to see the group at the Rose Morning Star. Koichi initially intends to go on alone, but the group refuse and join him despite the dangers.

The gang finally arrives at the Rose Morning Star where they find a castle where data is being drawn to it. All Koichi knows is that Cherubimon is collecting data for an unknown reason and the group spirit evolves to make their way into the castle. At the gate, they are attacked by two Phantomon and all but Loweemon are captured. Loweemon manages to avoid the Phantomon's attacks and destroy them, freeing the others. Making their way into the castle, they come under attack by mysterious shadows coming from mirrors, but are saved by Oryxmon. The group is initially wary of him despite his promises to take them to Ophanimon until Patamon announces that he is good. Oryxmon leads the group to an imprisoned Ophanimon who explains the events leading up to this: there was a war between Human and Beast Digimon that was stopped when Lucemon came and brought peace to the Digital World until he was corrupted by his own power. The Ten Ancient Warriors defeated him and disappeared, leaving behind two Spirits each and the three Celestial Digimon, Seraphimon, Ophanimon and Cherubimon to rule the Digital World. Cherubimon had different beliefs than Serpahimon and Ophanimon and was eventually corrupted by jealousy and evil, becoming a monster. He led an army of Beast Digimon against his two former friends and seriously wounded Seraphimon, causing Ophanimon to sacrifice herself to Cherubimon's custody to save him. Cherubimon then created the Evil Legendary Warriors and sent them and evil Digimon out into the world to gather data and cause chaos, causing Ophanimon to call for children from the human world to come and bring peace back to the digital one. Ophanimon tells them that with the power of the Ten Legendary Warriors they must now defeat Cherubimon who shows up himself and tells them that them coming there was all part of his plan to gain their Spirits in order to use them and the data he is collecting to take over the Digital World. As Cherubimon gloats, the Spirits start reacting, making the kids nervous.

Pleased with the fact that everyone is now there, Cherubimon destroys Oryxmon as his usefulness has come to an end. He reveals to a shocked Loweemon that he was just using him the whole time he was Duskmon to make sure that all of the Spirits arrived at his castle so he can get ultimate power. Loweemon attacks Cherubimon, but as they are in a room full of light with no darkness, his power is weakened and he has no effect on Cherubimon who attacks him back so Takuya and Koji quickly evolve to Aldamon and Beowolfmon. Unfortunately their attacks don't work due to the great light so they take the fight outside while the others work on freeing Ophanimon. As Aldamon and Beowolfmon hold off Cherubimon, Beetlemon, Loweemon, Kumamon and Zephyrmon work on breaking the mirrors reflecting the light beams in order to free Ophanimon. Ultimately Aldamon and Beowolfmon are defeated and Cherubimon gets Takuya and Koji's D-Tectors. He then proceeds to attack the others, getting all of theirs until only Zephyrmon is left. At the last moment, Ophanimon breaks free and saves Zephyrmon who is devolved to Zoe. Ophanimon faces Cherubimon and apparently purifies him, but in reality steals back the D-Tectors while he is distracted and gives them back to the kids before teleporting them outside. Ophanimon blasts Cherubimon onto a cliff edge, but contacts the group through Takuya's D-Tector to tell them that she failed and that they must combine their Spirits to defeat Cherubimon. With the last of her power, Ophanimon evolves Takuya and Koji's D-Tectors before becoming a Digi-Egg. Realizing what Ophanimon means, the group quickly splits all of the Spirits, including their own, between Takuya and Koji, allowing them to evolve into EmperorGreymon and MagnaGarurumon who prepare to fight a recovered Cherubimon.

Takuya and Koji evolve to EmperorGreymon and MagnaGarurumon and battle Cherubimon after getting their friends to safety on Cherubimon's castle. Eventually they defeat him, but he disappears and his castle is destroyed. Koichi nearly falls to his death during the escape, but is saved by MagnaGarurumon. While the group is wondering what to do next, an IceDevimon arrives that according to Bokomon went on a rampage across the Digital World, killing Digimon and absorbing their data. Eventually an army defeated him, but he was too powerful for even Cherubimon to kill so he was imprisoned beneath his castle and escaped when it was destroyed. He quickly freezes Takuya and Koji's D-Tectors so they can't fight and engages the others who spirit evolve to fight him. IceDevimon proves too powerful for the group and traps Kazemon and Beetlemon. Kumamon and Loweemon evolve into Korikakumon and JagerLoweemon, but are unable to defeat him and he traps Takuya and Koji in a bubble in which they slowly freeze. JagerLoweemon frees them and has Korikakumon free the others. Beetlemon and Kazemon quickly evolve into MetalKabuterimon and Zephyrmon and Korikakumon and Zephyrmon use their wind and ice to freeze IceDevimon, holding him in place while MetalKabuterimon blasts him, cracking and weakening him. With IceDevimon weakened, JagerLoweemon is able to destroy him and turn back into Loweemon to purify him. With IceDevimon gone, Takuya and Koji's D-Tectors return to normal and Koichi is accepted as a full member of the group. However, Cherubimon is revealed not to be dead and still collecting data to himself in the ruins of his castle, causing them to realize that its not over yet.

More data streams to the top of the ruins of Cherubimon's castle before stopping. However, it affects the gravity of the area. Realizing that they still need to stop Cherubimon and that this could be their last battle, Takuya and Koji evolve back into EmperorGreymon and MagnaGarurumon and make their way to the castle to finish the fight. Cherubimon compresses all of the data he has gathered into an orb and puts it into his forehead, increasing his power. MagnaGarurumon distracts him, allowing EmperorGreymon to launch a massive attack upon Cherubimon, destroying most of his body. However, with all of the data he has inside of him, he is able to regenerate and grow to a massive size. Cherubimon is easily able to defeat EmperorGreymon and MagnaGarurumon, knocking them out for a minute, but they recover. Following MagnaGarurumon's idea, they charge Cherubimon with MagnaGarurumon absorbing all of his attacks to allow EmperorGreymon in close to attack his forehead with his sword. MagnaGarurumon eventually falls, but EmperorGreymon reaches Cherubimon and stabs him in the head, mortally wounding him and releasing the compressed data. EmperorGreymon purifies Cherubimon who reverts back into his old good self and dies, crying after seeing the spirits of Seraphimon and Ophanimon. Takuya and Koji reunite with the others and celebrate the win which seems like the end, but its revealed that its not: the data released from Cherubimon travels to the Dark Area in the core of the Digital World and dissolves part of the seal keeping in Lucemon who releases the Royal Knights to pick up where Cherubimon left off and release him from his imprisonment through the data of the Digital World.

Everyone celebrates what seems like the final battle, but Koji is confused as to why the land hasn't been restored after the data was taken from Cherubimon. Suddenly a nearby mountain range is scanned and everyone rushes off to investigate but comes under attack by Baromon. When they spirit evolve, he stops the attack and reveals that Lucemon is returning and the Digital World still needs their help. Baromon takes the group to the Tunnel of History where he shows them what has led up to this point: when Lucemon was corrupted the Ten Ancient Warriors stopped him, sealing him in the Dark Area at the core of the Digital World. They then split into the Spirits which were split up among the three Celestial Digimon. Lucemon bided his time and eventually used his aura to corrupt Cherubimon and used him to gather the data of the Digital World so he could be released. When Cherubimon was destroyed, that data was absorbed by Lucemon. Through two new minions that Baromon is unable to identify, Lucemon is continuing his work and Baronmon prophesizes that he will return. While Baromon wants the kids to return to the human world, they refuse, wanting to stay and stop the return of Lucemon even if it means they have to defeat Lucemon himself. As they discuss things, the two evil Digimon scan the Tunnel of History and they are forced to flee to the surface. There they confront the Digimon who reveal themselves to be the Royal Knights, Dynasmon and Crusadermon who used to protect the Digital World but now serve Lucemon. The group quickly evolves to Aldamon, Beowolfmon, Kumamon, Kazemon, Beetlemon and Loweemon and take on the two, but have no effect on them even after evolving to their Beast forms and are easily defeated. Takuya and Koji evolve into EmperorGreymon and MagnaGarurumon but even their most powerful attacks have no effect on the Royal Knights and they are defeated. When Baromon tries to attack, the Knights send a wave of energy at him and the kids, but Baromon takes the attack for them and is destroyed while all the kids except Koichi's Fractal Code is revealed. EmperorGreymon and MagnaGarurumon again try to stop them before they can kill their friends, but Dynasmon launches his "Breath of Wyvern" attack which is so powerful it blows the group to the moon while Lucemon demands his servants collect more data for him.

Dynasmon's attack creates a warp that pushes the group to the Digital World's Blue Moon where all but Koichi are left injured and unconscious. Koichi locates some Starmon that take them to their base and help the others recover from their injuries. In the Digital World, Dynasmon and Crusadermon rapidly scan various areas and send their data to Lucemon, drawing ever closer to freeing him and his promise of helping them reach the human world so they can rule it. The gang tries many different methods to reach the Digital World, but fail, learning that there is an electromagnetic stream blocking them from getting back there. With the help of the Starmon and some Burgermon who are friends with the Burgermon they helped previously, they launch themselves in a rocket to the Digital World at the one point in time when the Electromagnetic Stream can be crossed. They don't have enough speed so Takuya evolves to BurningGreymon and pushes them through the stream. On the other side, they land on a Trailmon track and a Trailmon named Mole agrees to push them the rest of the way back.

Dynasmon and Crusadermon scan another area and decide to head to the nearby Steel Town to get the data there. In Steel Town, the gang arrives back in the Digital World on Mole and while making their way into town, are confronted by Sagittarimon who wants their possessions, but keeps getting confused with the word obsessions. Before the kids can spirit evolve and deal with him, four more kids, Katsuharu, Teppei, Teruo and Chaki arrive with an Angemon who scares off Sagittarimon. Tommy is unhappy to see them as he recognizes Katsuharu and Teppei as two kids who bully him and pushed him onto the Trailmon to the Digital World. The new kids explain that they were among the other kids Ophanimon called to the Digital World, but stayed when she sent everyone home and have been traveling with Angemon who protects them while having adventures. The gang tries to convince the other kids to go home, but they refuse. Angemon explains that Ophanimon assigned him to protect the kids when they refused to leave and they refuse to listen even to him about going home. Teppei tries to bully Tommy into forcing the main group to leave instead, but Katsuharu stops him, though he continues to pick on Tommy who finally stands up for himself to the two. Before things can go further, Sagittarimon returns with an army of Centarumon and attacks. Angemon holds them off by himself, but a group sneak around and go after them from the side. When Teppei is in trouble, Katsuharu freezes, but Tommy saves his life then evolves to Korikakumon to protect Katsuharu and his friends. The others quickly evolve as well and Agunimon, Lobomon, Loweemon, Kazemon, Beetlemon and Korkikaumon drive off the army while Angemon defeats Sagittarimon. Recognizing Tommy's bravery, Katsuharu makes peace with and befriends Tommy and decides its time for his group to return home. However, the Royal Knights arrive, kill Angemon and kidnap Katsuharu's group. Tommy grabs onto their net and follows them as they leave.

The Royal Knights take Katsuharu, his friends and Tommy to a village called Beanstalk Village that has a giant beanstalk in the middle. Dynasmon demands the location of a key, but the kids don't know what he's talking about so he locks them up with the villagers, the Mamemon. The Mamemon Elder explains that Katsuharu and his friends had previously visited and the Mamemon shared their food with them despite not having much. As a gesture of their friendship, the kids planted the Mamemon's last bean for them and it grew into the giant beanstalk. The beanstalk prevents the Royal Knights from scanning the land and they need the key to getting rid of the beanstalk to get the data. They kidnapped the kids because they believe they know where it is. Meanwhile, Takuya and the others are warned not to go to Beanstalk Village by scared Trailmon, but they hitch a ride on Worm when he tries to take off without them. They find the tracks broken and start using tracks from behind Worm to fix them with Takuya's determination to save the Digital World renewing Worm's spirit. At the village, Tommy and the others get free but are attacked by the Royal Knights who kidnap the Elder and tie up Tommy. Crusadermon tries to scan Katsuharu's Fractal Code, but he is saved when the others arrive. Takuya and Koji quickly evolve to EmperorGreymon and MagnaGarurumon, but their attacks have no effect on the Royal Knights and Koichi is taken hostage. The Mamemon attack, allowing MagnaGarurumon to rescue Koichi, but Dynasmon and Crusadermon beat up EmperorGreymon and MagnaGarurumon. Before they can be killed, the Mamemon Elder reveals that the key is a golden bean pod at the top of the beanstalk. The Knights destroy it and with it gone, they are able to scan the entire area while the Mamemon, kids, Bokomon, Neemon and Patamon escape on Worm. Katsuharu offers to take the Mamemon back to the human world, but they refuse to go and reveal they have another bean to plant to create a new beanstalk. Katsuharu and his friends return home on Worm, but not before Katsuharu has Tommy shove him onto the Trailmon so they are even from when he shoved Tommy on to enter the Digital World.

Traveling through what's left of the Digital World on a Trailmon, the gang comes across the Village of Beginnings where all Digimon are born and reborn. There they meet Swanmon, the caretaker and learn that she has to take care of all of the babies born because the Trailmon are too scared to transport them to their families. After reminiscing about their families and being part-Digimon now, the gang go to try to convince the Trailmon to transport the babies but fail. They return to find that the Royal Knights have arrived to scan the Village and explain that Lucemon now plans to populate the world with clones he can control. Takuya and Koji quickly evolve to EmperorGreymon and MagnaGarurumon to do battle but don't fight as they are scared of hurting the eggs. While the others gather the eggs, Zoe goes to the Trailmon again and convinces them to help. EmperorGreymon and MagnaGarurumon are quickly beaten and revert to Takuya and Koji. Dynasmon tries to use his "Breath of Wyvern" attack to finish them, but the babies are able to destroy the attack with a combined attack of their own. Before anymore can happen, the purified Spirits of the other Warriors travel to their Digi-Eggs and take physical form to help fight. The kids quickly spirit evolve to their Human Warrior forms and the Ten Legendary Warriors work together to defend the Village of Beginnings. Together, they are too powerful for Dynasmon and Crusadermon and the Royal Knights retreat, but Dynasmon scans the Village as he leaves and sends the data to Lucemon. The other Warriors return to their egg state while their Spirits return to Takuya and Koji. While they failed to save the Village, the battle allowed Bokomon, Neemon, Patamon and Swanmon enough time to get all of the eggs and babies loaded on the Trailmon who take them home. While they have lost again, Takuya is determined that they will find a way to win and restore the world.

The kids worry about their chances of winning since even with the Ten Legendary Warriors together, they were unable to defeat Dynasmon and Crusadermon. Worrying about what to do next, a bunch of Poyomon arrive and warn that the Village of Flames, Bokomon and Neemon's home and where they started their journey is under attack by Lucemon's servants. Catching a ride on a passing Angler Trailmon, they quickly head back to the Village to save it. Near the Village, a SkullSatamon forces a Gazimon to tell him where to find the data for the forest so he can scan it, then kills him and the other Digimon who had refused to tell him while an impatient Lucemon tells the Royal Knights to aid his servants in scanning the data of the world. The group arrives, happy to find the Village still in one piece, but witness SkullSatamon scanning the forest and sending the data to Lucemon. The inhabitants lose faith in the kids, but they rally them to defend their home so SkullSatamon awakens his brother to help. This scares off the inhabitants, but Takuya and Koji evolve to EmperorGreymon and MagnaGarurumon to do battle. The two easily beat the two SkullSatamon, but they summon a third brother and together are too much for EmperorGreymon and MagnaGarurumon. One forces a Biyomon to tell him where to find the data, but before he can scan it, the inhabitants of the Village attack. They have no effect, but it allows EmperorGreymon and MagnaGarurumon to recover and counterattack. Finally, EmperorGreymon destroys and purifies the SkullSatamon brothers, but Crusadermon shows up and takes the data anyway and sends it to Lucemon while everyone escapes on EmperorGreymon and MagnaGarurumon. Though they have lost their homes, the fight restores the faith of the inhabitants of the Village of Flames in the kids and winning and increases everyone's determination to win against the Royal Knights and stop Lucemon.

The Royal Knights scan another area and are excited as there are only four areas left of the Digital World. Koji's Gotsumon friend tries to defend the statues that had released the Beast Spirit of Light from a bunch of Knightmon, but is nearly killed until the kids arrive and spirit evolve to help. While they win easily, the Royal Knights arrive and destroy the jewel that had released the Spirit, allowing them to scan the area, callously sacrificing their Knightmon to do so. They then reveal that only the Forest, Light and Ice areas are left and that they are headed to the Forest Area next before leaving. Gotsumon convinces Koji to allow him to join them in their mission to save the world and they travel to Seraphimon's Castle in the Forest Area where the Royal Knights and their Knightmon minions are unable to break in due to an energy barrier protecting the place. While MagnaGarurumon and Gotsumon take on the Knightmon, the others go after the Royal Knights who had left to try to get into the Castle from above. Attacking the barrier at its weakest point at the top, the Knights are able to start to weaken it. At the same time, someone opens a hole in the barrier for Takuya, Koichi, Zoe, J.P., Tommy, Bokomon, Neemon and Patamon and leads them to a statue of the three Celestial Digimon which contains the data for the area. Dynasmon eventually breaks through the barrier and destroys the Castle, but they are shielded by Sorecermon's spirit which had been guiding them all along. Takuya quickly evolves to EmperorGreymon to battle Dynasmon while Gotsumon and MagnaGarurumon try to destroy the Knightmon who reform no matter what they do. Crusadermon joins the fight and beats on MagnaGarurumon and Gotsumon's desire to help causes him to digivolve to his Ultimate form of Meteormon. Meteormon destroys the Knightmon and helps hold off Crusadermon. Dynasmon and EmperorGreymon fight to a draw and then fire at each other, but Dynasmon really aims for the statue and destroys it, getting the data. While EmperorGreymon and MagnaGarurumon are willing to continue the fight, Crusadermon attacks Meteormon and makes him de-digivolve to Gotsumon and the disappearing ground forces the two to choose between saving their friends or fighting. With no other choice, they save their friends, leaving only two areas left. As the gang continues on to the next area on a Trailmon, an injured Gotsumon stays behind, putting his hopes in the group saving the world.

The Royal Knights head for the Autumn Leaf Fair in the Ice Area to scan the data watched by Sepikmon through his Spirit Boomerang. Using a satellite dish created by Datamon, Takuya and Koji explain to him that there are only two areas left: the Ice Area and the Light Area where Ophanimon's Castle is. However, no one has ever been able to find the data to that area so they know the Royal Knights will head to the Fair first. At the same time, Zoe, Bokomon, Neemon and Patamon evacuate the town's residents while J.P. moves parts of the town around to break up the Fractal Code and Tommy and Koichi work with the Toucanmon (who are now fans of the gang rather than Ranamon) to build a snow catapult to be able to do something to help in the fight to come. As the Knights approach, an army of Digimon made up of Zanbamon, Gryphonmon, Pteramon, GranKuwagamon and five Airdramon arrive to try to stop them, but are easily destroyed. Takuya and Koji quickly evolve to EmperorGreymon and MagnaGarurumon to help, but only get there in time to save two Airdramon. The two battle the Royal Knights, assisted by their friends with the catapult. The others succeed in hitting Crusadermon as she battles EmperorGreymon, but Dynasmon tackles him against the town's furnace while MagnaGarurumon picks up the fight with Crusadermon. EmperorGreymon does badly against Dynasmon even with the others help until he draws on the heat of the furnace to power himself further and is able to fight back more effectively against Dynasmon. When the others attack Crusadermon, they accidentally cause her to attack them. MagnaGarurumon takes the hit and Koichi is shocked to discover he is the only one without their Fractal Code exposed. As Koichi tries to understand why he's the only one who never gets hurt, Crusadermon explains that only those with physical form display Fractal Code meaning that Koichi is only a spirit in the Digital World. Before she can explain more, MagnaGarurumon recovers and attacks her. Dynasmon's fight with EmperorGreymon exposes part of the town's data, but as it is scattered, Dynasmon is unable to easily collect it. Crusadermon holds off EmperorGreymon and MagnaGarurumon as he puts it back together, but they defeat her. Before EmperorGreymon can finish Crusadermon, Dynasmon takes his attack and puts the data back together. EmperorGreymon blows the Knights away, but they still collect the data as they go and take off to deliver it to Lucemon while EmperorGreymon and MagnaGarurumon take their friends to safety. Knowing there is only one area left of the Digital World, they fly off to the Light Area and Ophanimon's Castle to protect it.

Dynasmon and Crusadermon visit Lucemon in the Dark Area excited by the fact that they only have one area left to scan before Lucemon is free, something they promise to achieve for him. Crusadermon shows doubts about Lucemon's promise to give them the key to the human world so they can rule it, but Dynasmon chides her, saying her doubts will make her weak. The gang arrives at the Light Area and Ophanimon's Castle and decide to search for the area's data before the Royal Knights can find it, though Koichi is still troubled by what Crusadermon revealed about him being just a spirit in the Digital World. Entering the castle, the group finds Nefertimon who reveals that the castle's books hold all the knowledge of the Digital World as soon as it happens, but she is unaware of where the key to the area's data is. The group breaks up into groups to search the castle: Bokomon, Neemon and Patamon, Takuya and Zoe, Koji and Koichi and Tommy and J.P. While searching, Koichi is distracted by thoughts of how he is a spirit while Koji is excited by the idea that they can see each other all the time when everything is over, Tommy and J.P. are scared of things going wrong so J.P. does magic tricks to cheer them up and Takuya and Zoe talk about how Zoe now knows how it is to be a real friend thanks to the group. Just as she seems about to admit something to him, she finds him asleep. As the group meets up, Bokomon reveals to Koichi he knows what Crusadermon told him, but promises to keep it a secret. The next day, the Royal Knights arrive to scan the area and Takuya and Koji evolve into EmperorGreymon and MagnaGarurumon. The Royal Knights reveal they already know what the key to the area is: Nefertimon herself. When Nefertimon is unable to defeat them, she asks the two Warriors to kill her to protect the area but they refuse and attack the Royal Knights. Fighting in hand-to-hand combat, EmperorGreymon and MagnaGarurumon are able to hold their own against Dynasmon and Crusadermon, but Lucemon sends out beams of energy from the Dark Area which blast the two down and return them to Takuya and Koji. The Royal Knights destroy Nefertimon and scan the data of the area, sending it to Lucemon and finally freeing him from his prison. Lucemon travels to where everyone is and they are shocked to discover that he has the appearance and personality of a little kid. Lucemon reveals that he plans to create a new Digital World of his own and blows everyone away with a blast of energy. They are saved by an Angler Trailmon who takes them to the Yellow Moon. Despite the destruction of the Digital World, everyone is still determined to stop Lucemon and save the world.

The gang arrives on the Yellow Moon where all but Takuya and Koji despair over the fate of the Digital World and believe its over. At the same time, Koichi is haunted by Crusadermon's revelation that he is only a spirit in the Digital World. In the remains of the Digital World, Lucemon meets with the Royal Knights and is annoyed by their demanding the key to reaching and ruling the human world and Crusadermon's lack of faith in his promise to give it to them. Lucemon orders them to travel to the moon and kill the gang. On the moon, the group finds the Dig-Eggs from the Village of Beginnings which have been relocated to the moon and play with the Digimon that have hatched from them. Two Digi-Eggs hatch and the Digimon digivolve into Lopmon and Salamon who make friends with and play with Patamon. Bokomon realizes that the two are actually the reborn Cherubimon and Ophanimon and the gang is happy because they have forgiven each other for their past transgressions and have the chance to grow up together as friends. This increases their determination to restore the Digital World. However, the babies all run away and the three Celestial Digimon reveal that the Royal Knights are on their way and the group wonders whether to run or fight. Takuya reflects back on all they have been through and decides to fight and the others agree. Takuya and Koji evolve into EmperorGreymon and MagnaGarurumon as the Royal Knights arrive and do battle with them. This time the two are more powerful than the Knights and MagnaGarurumon finally finishes Crusadermon with a point-blank attack. Enraged, Dynasmon tries to use his "Breath of Wyvern" attack to destroy EmperorGreymon, but EmperorGreymon easily destroys the attack and finishes Dynasmon with a strike from his sword. However, before EmperorGreymon can purify the Royal Knights, Lucemon appears and blasts EmperorGreymon and MagnaGarurumon away before absorbing the Knights' Fractal Code, allowing him to digivolve to his Ultimate form of Lucemon: Chaos Mode. Lucemon explains that he believes the world needs a ruler like him to keep from falling into chaos and offers the gang a chance to join his new world order or be destroyed, but they refuse. EmperorGreymon and MagnaGarurumon attack Lucemon, but have absolutely no effect on him and he retaliates, reverting EmperorGreymon into Takuya and cracking the surface of the moon. Lucemon starts to steal Takuya's Fractal Code, but MagnaGarurmon intervenes so Lucemon beats him back into Koji. However, Lucemon's attack causes the whole moon to explode.

The Yellow Moon explodes and debris from the explosion destroys the other two moons, killing all of the Digimon on them. Lucemon leaves, satisfied with what he has accomplished, not knowing that the gang has survived. Takuya and Koji are rescued by Patamon, Lopmon and Salamon who bring them back to the others who have once again lost hope. Trying to figure out how to defeat Lucemon, the Celestial Digimon reveal that the key is to combine Light and Darkness, but don't know how that is supposed to be done. Lucemon travels to the Dark Area at the core of the Digital World and uses the chaos there to start to build a portal to the human world. On a piece of one of the moons, Koji confronts Koichi about what has been bothering him and though Koichi doesn't tell him, he does ask Koji to go see their mother when everything is over. At the same time, Bokomon tells the rest of the group about how Crusadermon revealed that Koichi is only in the Digital World as a spirit and it has been haunting him and they theorize that its because of how he came into the world: they came on Trailmon but Koichi fell down some stairs and then was suddenly there. Seeing the data streams Lucemon is sending out into space to create his portal, the group has Patamon, Lopmon and Salamon push the rock they are on towards the Dark Area and are shocked when a portal starts to form and shows Shibuya. Bokomon learns from his book that if Digimon go to the human world, they will cause utter chaos and eventually destroy it. Determined to stop Lucemon, they quickly spirit evolve to Aldamon, Beowolfmon, Kazemon, Kumamon, Beetlemon and Loweemon and attack Lucemon in the Dark Area. However, their attacks have no effect on Lucemon and after knocking Loweemon away, Lucemon blasts the others with a combination of Light and Darkness in his "Ultimate Sacrifice" attack. The kids are reverted back to their human forms and Lucemon launches the same attack to finish them off, but Loweemon intercepts the Darkness, trying to use his power as the Warrior of Darkness to stop it. Loweemon fails and is consumed by the attack, killing him and reverting Koichi into a spirit. Koichi apologizes to his friends for not being able to be with them further though he has no regrets and sends the Spirits of Darkness to Koji before being scanned by Lucemon. As Koji mourns the death of his brother, the combination of his spirits and Koichi's and his and Takuya's outrage causes the two of them and the 20 Spirits of the Legendary Warriors to combine into Susanoomon who prepares to face off with Lucemon in the final battle.

Enraged by the death of Koichi, Takuya and Koji Ancient Spirit Evolve together with all the Spirits of the Ten Legendary Warriors into Susanoomon and face off against Lucemon. Lucemon offers Susanoomon the chance to join him, but knowing how evil Lucemon really is, he refuses. Lucemon attacks Susanoomon with his "Paradise Lost Punch" attack, the attack that destroyed the three moons, but Susanoomon is able to stop and injure Lucemon. However, Lucemon gets the upper hand and uses the "Ultimate Sacrifice" attack that killed Koichi on him. Reflecting on Koichi's sacrifice gives Takuya and Koji the strength they need and they split into their human selves with ten of the Spirits surrounding them, allowing them to avoid the attack. The two reform into Susanoomon and launch their "Celestial Blade" attack upon a scared Lucemon, finally destroying him. Susanoomon purifies Lucemon who reverts into two Digi-Eggs, one Light and one Dark. The Light egg explodes and tries to purify the Dark Area, but the Dark one absorbs the Dark Area and hatches into Lucemon: Shadow Lord Mode. Bokomon realizes that Susanoomon was only able to purify Lucemon's good data and his evil data was left to grow. As Shadow Lord Mode, Lucemon is now evil incarnate and unstoppable. Lucemon ignores the group and starts to head to the human world so the gang evolves to Aldamon, Beowolfmon, Kumamon, Kazemon and Beetlemon and follow him, reflecting on what they've learned on their journey and how it has made them each a better person. Lucemon arrives in the human world in the Trailmon Station and sends out a message to every electronic device in the world stating "You Must Follow Me Or Be Destroyed." Everyone catches up and attacks, but Shadow Lord Mode is too powerful and easily regenerates from their attacks. Lucemon blasts them with his "Tide of Despair" and triumphantly repeats his message to the humans.

Lucemon blasts the gang with his "Tide of Despair" attack, reverting them to human form and sending them crashing back to the ruined Trailmon Station. Takuya initially wants to continue the fight, but after Koji reminds him that Lucemon is seemingly invincible and will destroy them if they try again without a smart plan, Takuya loses hope and gives up until Agunimon, Lobomon, Kumamon, Kazemon and Beetlemon come to life to remind them that they're a team and together they can overcome anything. Grumblemon, Arbormon, Ranamon, Mercurymon and Loweemon also come to life to support them and the spirits of Ophanimon, Seraphimon and a purified Cherubimon appear to give them advice, telling them that while this will be their hardest and most important battle ever, they can beat him as a team and that Lucemon is evil incarnate in his current form and has no consciousness. Together the Spirits and human children evolve into a more powerful Susanoomon and attack Lucemon just as he reaches the surface, dragging him back to the train station. Remembering what Cherubimon had told them about Lucemon's weakness, they realize something is controlling him and spot another form, Lucemon Larva, in the orb that Lucemon: Shadow Lord Mode holds, but Lucemon Larva blasts them away before they can do anything and Lucemon launches an attack that destroys what's left of the station and starts consuming it and the little that remains of the Digital World. Following an idea by Takuya, Susanoomon flies into Lucemon's orb, absorbing attacks from Lucemon Larva all the way, and punches Lucemon Larva, knocking him out of the orb and breaking his control over Lucemon: Shadow Lord Mode. With no one in control of him, Lucemon: Shadow Lord Mode goes berserk, attacking everything in sight, but Susanoomon pins him down with his "Heaven's Thunder" attack and destroys him with "Celestial Blade," releasing all of the data Lucemon had collected from the Digital World. It seems to be over, but Lucemon Larva launches a sneak attack on Susanoomon who ejects the kids and takes the blow. Susanoomon breaks a sword out of his cannon-like weapon and splits into Agunimon, Lobomon, Loweemon. Kazemon, Kumamon, Beetlemon, Grumblemon, Arbormon, Ranamon and Mercurymon who each slice Lucemon Larva with the sword, destroying him and thus Lucemon, forever. As the Spirits congratulate and thank the kids, their D-Tectors rebuild the Digital World back to the way it was before Lucemon's reign of terror, making it an even better place now that the evil is gone. Unfortunately Lucemon's portal starts to close so the Spirits are forced to throw the kids through it before they get trapped in the Digital World. Bokomon tries to follow, but is stopped by Neemon, Patamon, Salamon and Lopmon and promises to write a book about their adventures and to never forget them. On the way home, Loweemon contacts Koji and reveals that he can sense Koichi is still alive and upon their return, which they discover to be a short time after they initially left, the gang looks for Koichi and finds him apparently dead at the hospital. However, the groups D-Tectors revive and heal Koichi before returning to being cell phones. Afterwards, the gang lives better lives using what they learned in the Digital World: Takuya spends more time with his family, Zoe, J.P. and Tommy now have real friends and Tommy is no longer bullied, Koji finally accepts his step-mother and meets his real mother with Koichi, but all promise to never forget each other and to be best friends forever.

Koji Minamoto
Upon finding out from his grandmother that Koji existed, Kouichi proceeded to somewhat stalk him, as he was very curious as to what kind of person Koji was. But when Koji was chosen to go to the Digital World and Kouichi was left behind, Kouichi began to feel resentment and jealousy, which caused Cherubimon to take him in and transform him into Duskmon.

As Duskmon, there are some significant traits of his fixation that remain. He starts to regain himself when Takuya yells Koji's name, and eventually regains his memories back. However, his anger towards Koji is still manipulated by Cherubimon and it takes a straight-on confrontation from Koji to get Kouichi back to normal.

Once he gets back to normal, and now a member of the DigiDestined. Kouichi continues to pursue his goal of finding more about Koji's personality, eventually developing a protective and caring side towards him. This culminates when Kouichi sacrifices himself in the interests of his brother.

Kouichi survives by virtue of not truly being in the Digital World, and eventually he goes to take Koji to see his mother.

Knownable Relatives

 * Unnamed Mother (Mother)
 * Unnamed Father (Biological Father)
 * Unnamed Maternal Grandmother (Grandma/dead)
 * Koji Minamoto (Younger Twin Brother)

Trivia

 * His name, Koichi (輝一) means "radiance" (輝?) and "one" (一?). "輝" is likely a reference Koji, wielder of the Spirits of Light, while "一" likely refers to the fact he is a first-born. His surname, Kimura (木村?) means "wood village". Possibly a reference to the kimura-gumo, as spiders are part of goth subculture, and Koichi is the wielder of the Spirits of Darkness.
 * Koichi has three theme songs: the vocal "Oreta Tsubasa de -With Broken Wings-", the instrumental "Yami no Theme" (闇のテーマ? lit. "Theme of Darkness"), and the English only "Darkness in My Heart". As Duskmon, he also has another theme song titled "Blader". A version of his Spirit Evolution and fractal code digitize speech appears on Digimon Frontier: Christmas Smile as "Spirit Evolution!! ~Kōichi-hen~". He speaks the "From Kōichi to Kōji..." track in the CD drama, Digimon Frontier Original Story: Things That Want To Be Told.
 * From a franchise standpoint, Koichi is a part of the Spirit Singers, a group composed of his fellow DigiDestined from Digimon Frontier. They made their debut in the Digimon Frontier: Christmas Smile album.

Voice Actors
all information on Koichi Kimura came from http://digimon.wikia.com/wiki/Koichi_Kimura
 * Japanese : Kenichi Suzumura
 * English : Crispin Freeman