|This article is about a/an set of alternate forms in Kamen Rider Ghost.|
Billy the Kid Damashii (ビリー・ザ・キッド魂 Birī Za Kiddo Damashī, lit. "Billy the Kid Soul") is an alternate brown cowboy-based form of the ghost Riders themed after Henry McCarty aka Billy the Kid, a legendary Wild West American outlaw and gunman who rustled horses and killed many men but is romanticized in pop culture as a rebel and folk hero. Accessed through the Billy the Kid Ghost Eyecon, this form bears the Persona Gunslinger (ペルソナガンスリンガー Perusona Gansuringā) helmet with the Face Revolver (フェイスリボルバー Feisu Riborubā) faceplate. While it is mostly used by Kamen Rider Ghost, it can also be used by other Riders.
While assuming Billy the Kid Damashii, a Kamen Rider dons the Gunshot Hood (ガンショットフード Ganshotto Fūdo) adorned with the Quick Draw Hat (クイックドロウハット Kuikku Dorou Hatto).
As one of the 15 heroic souls, Billy the Kid Damashii's power is also channeled through the Grateful Damashii which is accessed by Ghost via the Eyecon Driver G, appearing on Grateful's Armor Sublime as the Billy Guard (ビリーガード Birī Gādo).  Manifesting as a body, the Billy the Kid Ghost fights with his weapon of choice being either the Gan Gun Saber Gun Mode and Bat Clock Gun Mode or the Gan Gun Saber Rifle Mode.
In 2005, long after his death, Billy the Kid was reincarnated as a Parka Ghost by the Ghost Hunters with help from Sennin. Among the 15 luminary ghosts assembled by the lead Ghost Hunter, Ryu Tenkuji, who personally picked them with his reasoning being that these figures were people whose lives burned the brightest, their purpose was to counter the Gammaizers, the 15 deities of the Gamma World, in preparation for the Gamma invasion of the human world. Vacant Ghost Eyecons were prepared for each of the luminary ghosts, however, with the unforseen betrayal of Chikara Saionji leading to Ryu's death and the dissolution of the Ghost Hunters, all 15 ghosts were left sealed in unique objects which pertained to them each and would not be freed until the Gamma invasion finally arrived ten years later.
War with the Gamma
Driven by his trauma in the Gamma world, Takeru's desperate attempt to use the Eyecons to make a wish again made all of his Eyecons in his possessions to leave him. Eventually, with Specter lending Takeru his Eyecons and Alain had his left him due to no longer being subjected, all Eyecons agreed to cooperate and contributed to the creation of Eyecon Driver G, allowing Takeru to transform into Ghost Grateful Damashii.
Billy the Kid was defeated by Adel Rifle during the disastrous engagement against Adel and his 11 remaining Gammaizers by the 15 Heroic Ghosts and Ghost Grateful Damashii, having chosen not to rely on Mugen Damashii's power alone while facing the Gammaizers. Viewing themselves as now obsolete, the heroic ghosts would enter a brief period of unresponsiveness before soon enough returning to Takeru's side, as he asserted his faith in them, against Gyro.
Village of Heroes
Attacked by Dark Necrom R and Dark Ghost, Ghost was robbed of his Eyecons which were taken as part of Argos' machination. When Takeru and his friends followed them to the Island of Eyecons, Billy the Kid was found to be living in harmony as one of 100 reincarnated historical figure within the Village of Heroes. When Argos' Gamma forces attacked the village, Billy the Kid was struck down and reduced back to an Eyecon which was used by Dark Necrom B to fight Necrom before it was recovered along with the others by Argos. Gathering all 100 heroic Eyecons, Argos used them as a sacrifice along with Darwin's power of evolution to convert Takeru's dead body into a vessel for the ultimate Eyecon, the Extremer Driver, which he intended to use to fulfill his ultimate agenda of converting all life on both Earth and the Gamma World into ghosts. Ultimately, however, Takeru was able to gain the strength of the 100 heroes along with his friend's spirits, allowing him to defeat Argos seemingly at the cost of his own existence only for the 100 heroes to use their power to restore his soul with the original fifteen heroes returning to his side as he came back to Earth.
The Dr. Pac-Man Incident
When Ghost faced the Hatena Bugster, Billy the Kid was brought forth among all fifteen heroic spirits with the Eyecon Driver G only for the Bugster to repel even the God Omega Drive; Takeru would ultimately resort to a new power.
Billy the Kid is among the historical figures who are featured in Stories of the World's Greatest People, the book passed down to Takeru Tenkuji by Ryu Tenkuji. He is acknowledged under The Fast-Shooting Gunman of the Wilderness: Billy the Kid (荒野の早撃ちガンマン ビリー・ザ・キッド Kōya no Hayauchi Ganman: Birī za Kiddo).
Billy the Kid possesses Kanon again in the stage show, assuming his Kamen Rider Ghost form.
- Kamen Rider Ghost (Ghost Episode 7, 8, Super Movie War Genesis, Ikkyu Eyecon Contention!, Ghost 10, 11, Ikkyu Intimacy!, Ghost 25, 29, 38, 39)
- Kamen Rider Dark Necrom B (Kamen Rider Ghost the Movie: The 100 Eyecons and Ghost's Fateful Moment)
- Kamen Rider Specter (Kamen Rider Battle: Ganbarizing)
- Deep Specter (Ghost Change)
- Kamen Rider Necrom (Kamen Rider Battle: Ganbarizing)
- Kamen Rider Dark Ghost (Ghost Change)
Behind the scenes
As with the rest of the 15 heroic Parka Ghosts, Billy the Kid is voiced by Tomokazu Seki (関 智一 Seki Tomokazu). While possessing the body of Kanon Fukami, Billy the Kid is portrayed by Mio Kudo (工藤 美桜 Kudo Mio). His human form in Kamen Rider Ghost the Movie: The 100 Eyecons and Ghost’s Fateful Moment is unknown.
- On the other side of Super Hero Time, the ghost of Billy the Kid was brought back by Curse Monger alongside Joan of Arc and Dracula in episode 34 of Taiyo Sentai Sun Vulcan.