He works for Dr. Vega, with the job of distributing UMA to those who seek their power. He also kidnaps Luna Platz near the start of the game, whilst terrorizing Wilshire Hills by materializing ghosts. Dark Phantom later kidnaps Luna again, invoking memory data of Ophiuca to forcibly Wave Change her to Queen Ophiuca.
Eventually, it is revealed that he plans to turn against Dr. Vega and take over the world himself. He is then quickly disposed of, with Rogue referring to him as a "parasite". He is then knocked out by Hollow after he and Rogue fought. He was also the only one of the four main bosses to actually retain his wave change with his user, the rest of the UMAs possessing Murians to assume their forms.
During the Apollo Flame sidequest, it was Dark Phantom that has tricked Mega Man into opening a portal towards the Alternate Dimension and the real world. He is the 2nd boss the player has to beat before taking on the 7 warriors.
Dark Phantom appears once again, and assaults the WAZA main computer, but not as part of the Dealers. He seemed to have been driven insane, only lusting for revenge for being defeated and losing the power of Mu. To that end, he attempts to acquire the Noise Change program in Mega Man by holding Zack Temple and Dr. Goodall hostage. When Harp Note and Taurus Fire step up to fight him, his plan falls apart and he retreats into WAZA's computers, where Mega Man follows and fights him. After being defeated by Mega Man once again, the shock caused him to step backwards one too many times, falling off the Wave Road of the WAZA main computer's CyberCore. Though Omega-Xis thought he might return, he didn't.
Some of Dark Phantom's attacks mirror ShadeMan.EXE's.
- Phantom Illusion: On occasion, when the player attempts to attack Dark Phantom (except while he is attacking), Dark Phantom will phase out, avoiding damage from the attack. He often follows up with an attack of his own afterwards.
- Stick Sword: Dark Phantom attacks the player at his current position using his stick. Later versions have him attempt this many times if the first blow misses, but never exceed 3 times.
- Phantom Claw: Dark Phantom sends out a black hand from his chest, which breaks and pierces Invis.
- Phantom Slash: Dark Phantom moves up next to the player and performs a multi-hit wind attack that hits all panels around him. This removes Barriers and Auras, and must be blocked.
- Dark Hand: In the third game, on occasion a hand will emerge from a vacant panel and attack the player.
Dark Phantom is first seen fighting with Yeti Blizzard over the OOPArt, the Sword of Berserk. After Omega-Xis accidentally swallows it, and Geo being enlisted to travel the world in search of the other two OOPArts, Dark Phantom is repeatedly seen tailing Mega Man, attempting to take the OOPArt for himself.
In Egypt, he enters a pyramid rumored to contain an OOPArt, and while searching the pyramid, he encounters Mega Man. However, the Sword of Berserk is beyond Mega Man's control, so although Mega Man unintentionally invokes his Zerker Tribe, he is forced to abandon the fight to cancel Wave Change. Dark Phantom proceeds to search the pyramid, but all his efforts were in vain.
Later, at a ninja training school, Hyde joins the school with Rich Dotcom, and they search it for the OOPArt. Both of them eventually get discovered and Wave Change, and in the end they find the OOPArt. However, Mega Man and Rogue are on the scene too. In the midst of the chaos, Dark Phantom claims the Shinobi Shuriken for himself, joining a three-way struggle between Mega Man, Yeti Blizzard, and himself for each other's OOPArt.
Whilst running an art class, Hyde discovers Mega Man's true identity, and takes Hope Stelar, who happens to be nearby, hostage, and lures Mega Man. Although Harp Note joins the fight, the fear that they will hurt Hope results in Mega Man and Harp Note being unable to properly fight him. As Dark Phantom prepares to finish Mega Man off, he is interrupted by Yeti Blizzard's appearance, who reminds him that he's still after Phantom's OOPArt. However, Hollow ends up forcibly extracting the OOPArt from the both of them.
Dark Phantom eventually follows Dr. Vega to the Mu continent, being promised eternal life. He assists in the ritual for Le Mu's revival. However, as Le Mu begins to regain its strength, he escapes from Mu.
- Phantom has an unused battle texture of his head with the mouth open (presumably for laughing or talking) in MegaMan Star Force 3. 
|Mega Man Star Force series|
| Geo Stelar (Omega-Xis • Mega Man) • Sonia Strumm (Lyra • Harp Note) • Bud Bison (Taurus • Taurus Fire) • Luna Platz (Ophiuca/Vogue • Queen Ophiuca) • Zack Temple (Pedia) • Solo (Laplace • Rogue) • A.C. Eos (Acid • Acid Ace)|
Patrick Sprigs (Gemini • Gemini Spark) • Hyde (Phantom • Dark Phantom) • Aaron Boreal • Bob Copper • Hope Stelar • Kelvin Stelar
| Mega Man Star Force • 2 • 3|
Shooting Star Rockman: Wave Change! On Air! • Rockman.EXE Operate Shooting Star
| Mega Man Star Force • Shooting Star Rockman Tribe |
Rockman the Shooting Star • Rockman the Shooting Star Tribe
Shooting Star Rockman 3 • Shuugeki On-Air!! Shooting Star Rockmeen!
| Battle Card • BrotherBand • Link Power • EM Being • EM Wave Change • Planet AM • Planet FM • OOPArts • Dealer • Satella Police|
Transer • Star Carrier • Hunter VG • Visualizer • Star Break • Tribe On • Noise Change
Wave Scanner • Wave Command Card • Noise Kaizou Gear