Dark Miyabi is a merciless, professional assassin who will do anything for money. He showed little sadness when ShadowMan was absorbed into the Dark Galaxy, and absolutely no remorse over any of his actions, no matter how horrible. Even though he can come off as cruel, he maintains some degree of honor when it comes to battles.
Although Dark is never mentioned in the first game, residual data of his Navi, ShadowMan, emerges late in the game in Internet Area 15, after MegaMan obtains 140 Battle Chips. Apparently, Dark sent ShadowMan into that area of the Net long ago to infiltrate the World Three (WWW) on an unknown assignment, but broke it off around the time Lord Wily initiated his plans for world domination, at which point it became too difficult to keep a low profile.
Dark only had a brief cameo in this game, appearing at the very end after the credits to inform ShadowMan about their new job with Gospel.
Dark was hired by Sean Obihiro to destroy YumLand and then Electopia. He states that if he was given enough money he'd do anything they'd want him to, to which The Gospel Leader replied that he liked working with "pro assassins" like him (the word 'Assassins' was removed in the American release). It is later stated in MegaMan Battle Network 5, that very few members of Gospel in Battle Network 2 were even aware of his presence. Dark succeeds in his first mission in destroying YumLand's Cyberworld, but fails in his attempt to destroy the Mother Computer and leaves Gospel. Dark's quiet ties with Gospel allow him to remain unnoticed by the general public, and he slips away before Sean has a chance to punish him for his failure, and even before the officials catch on to his whereabouts. He disappears for a while to reconsider his methods, and has a very slight change of heart over time. It is later revealed in the ending of Battle Network 2 that some rogue minions of ShadowMan are deleted by MegaMan and ProtoMan, and YumLand's victims have been revived by backup data, including its leader, Cook.EXE.
In Battle Network 5, Dark resurfaces and joins Team Colonel to fight against Nebula. However, he first insists on testing Lan and leads him on wild games of tag throughout the Net, making him vacuum up all the clouds. After the test, Dark joins the team and helps them defeat CloudMan. In End City, he challenges Lan and MegaMan for the SoulNet server even though Dark wasn't under its influence. He participates in the raid against Nebula's base and loses ShadowMan to the Dark Galaxy, but later gets him back when he returns to help MegaMan. After the battle was successful, he leaves Team Colonel, stating that he hoped they wouldn't be enemies in the future. And, so far, that hasn't happened.
In the anime series, Dark isn't mentioned until the Stream season. He was hired by Gospel, but he never appeared in person. ShadowMan was hired by Nebula in Episode 12 of Axess, although Regal admitted that he'd been unable to locate Miyabi, to which ShadowMan did not comment on. He was deleted in that same episode by SearchMan.
Dark's first appearance is in Episode 36 of Stream. He is first seen trailing Yuriko, until he shows up in the midst of the chaos generated by Dark Rockman's appearance in the Net Police HQ and sends Shadowman to help out Rockman against the new generation Darkloids (Cosmoman, Blizzardman, Swallowman, and Cloudman). Since the showdown between Rockman and his dark self ends in a draw, they all leave.
Miyabi reappears in Episode 42, where he steals Netto's Synchro Chip and tries to delete Rockman because he signed up on a request made by Tesla Magnets before the Neo WWW was dismantled and she was taken hostage. He is thwarted by Yuriko and Needleman's intervention. At the same time, he receives the Crest of Duo, marking him as an ally of Netto. He then flees, although he does hear the announcement broadcasted by Duo across the world to all crest holders.
He reappears in Episode 43, where he attempts to destroy Rockman with physical means, but fail numerous times with comedic effect.
Eventually, he is discovered by Yuriko, who pursues him as he attempts to escape. Miyabi tries to fly away with a kite, but Yuriko cuts the string and sends him flying. He ends up at Maha Ichiban's and stumbles upon Netto. After some debating over what really motivates him, he flees, not wanting to do "everything a star tells him to do" despite Shadowman's protests.
Miyabi then tries to ambush Netto in the park while he was on his way to follow Swordman's trail. He encounters Dr. Wily in the park, where Wily tries to entice Miyabi with money to override Tesla's promised reward. Miyabi rejects the money by throwing a knife into it, and somehow burning it to a crisp while stating that he fights "in the name of the curry."
He keeps chasing Netto (along with Dr. Wily), and finds him and Dingo facing off against Swordman. But, the two are having trouble, because of explosive traps placed in the parking lot were the battle is taking place. Wily sends Miyabi a Synchro Chip to allow him to fight, and he battles and deletes Asteroid Swordman, saving both Netto and Dingo.
He later fights against with the other Cross Fusion members against Regal and Duo. After the fact, he becomes a regular customer at the Maha Ichiban's Restaurant.
In Beast, he attacks Zoanoroid Blizzardman before Cross Fusing. He is later seen defending the world against beast viruses and the super Cybeast Greizar, but is ultimately defeated by the monstrosity along with many other fellow Cross Fusion members.
Miyabi is first seen talking to Dr. Wily and putting a rather large bottle of liquor on the table to try to negotiate the devolution of his Synchro Chip. He is buried along with Wily under a pile of cans while they were sharing a drink. After Dr. Wily realized what Chirol and Captain Kurohige stole from him, Miyabi travels to the Hikari household to alert Netto of the problem. While there, he gets stuck in an embarrassing conversation with Netto's mother. After summarizing the situation to Netto, he and Shadowman team up with Netto and Rockman to fend off the beast viruses that were attacking R-Circusman and R-Divemanin the Cyberworld. He is last seen in Episode 26 drinking with Wily.
|Sean Obihiro and FreezeMan|
| Arashi Kazefuki and AirMan • Speedy Dave and QuickMan • CutMan • Princess Pride and KnightMan |
Gauss Magnus and MagnetMan • Dark Miyabi and ShadowMan
|Baryl and Colonel.EXE|
|Mega Man Battle Network 5||Lan Hikari and MegaMan.EXE • Princess Pride and KnightMan.EXE • Dark Miyabi and ShadowMan.EXE • Dingo and TomahawkMan.EXE • Higsby and NumberMan.EXE • Ribitta and ToadMan.EXE|
|MegaMan NT Warrior (manga)||Lan Hikari and MegaMan.EXE • ShadowMan.EXE • Dingo and TomahawkMan.EXE • Higsby and NumberMan.EXE|
|Dr. Regal (all games, anime, and manga) and LaserMan.EXE (all games and anime) • CosmoMan.EXE (manga)|
|Mega Man Battle Network 4||ShadeMan.EXE • HealNavis|
|Mega Man Battle Network 5||BlizzardMan.EXE • ShadeMan.EXE • CloudMan.EXE • Dark MegaMan.EXE • CosmoMan.EXE • Dark Colonel.EXE (Team Colonel) • Dark ProtoMan.EXE (Team Protoman) • Nebula Grey • Lackeys and HealNavis|
|MegaMan NT Warrior Axess||Ms. Yuri and NeedleMan.EXE • Dark Miyabi and ShadowMan.EXE • Anetta • Dark ProtoMan.EXE • BurnerMan.EXE • SparkMan.EXE • GravityMan.EXE • BrightMan.EXE • SwordMan.EXE • ColdMan.EXE • StarMan.EXE • FlashMan.EXE • BeastMan.EXE • DesertMan.EXE • PlantMan.EXE • VideoMan.EXE • BowlMan.EXE|
|Rockman EXE Stream||Nebula Grey • Dark MegaMan.EXE • CosmoMan.EXE • LarkMan.EXE • CloudMan.EXE • BlizzardMan.EXE|
|MegaMan NT Warrior (manga)||CloudMan.EXE • Nebula Grey • Darkloids|