But the fact that Tsukasa's photo never develop well hint him to be from another world while unaware of the effect as prelude of a convergence of the alternate dimensions known as A.R.
But Tsukasa soon understands what Narutaki meant upon learning that he was originally the Great Leader of the Dai-Shocker organization which sought to take all dimensions and that his true mission is to destroy the other A.R.
While in the World of Negatives, Tsukasa acquires the K-Touch (ケータッチ, Kētatchi) touchscreen cellphone that attaches onto the DecaDriver, replacing the card slot which is moved to his right hip, to enable Decade to assume his true Complete Form (コンプリートフォーム, Konpurīto Fōmu).
Tsukasa, feigning to resume his role as Dai-Shocker's leader, declares war on the Super Sentai and battled Captain Marvelous of the Gokaigers to an epic standstill before faking their deaths to catch the villains off guard once they reveal their actual plan to take over the world.
Tsukasa also appears in the Kamen Rider Wizard finale when summoned by the sorcerer Amadum to attack Haruto, only to aid his successor defeat the villain before departing for points unknown.
Fully aware of world's endangerment, Natsumi decides to accompany Tsukasa on his journey to prevent her dream from coming true.
[1][2][14][15][16][17][18][19] In the World of Decade, Eijiro is revealed to be a guise assumed by Shocker's Doctor Death (死神博士, Shinigami Hakase), an executive member of Dai-Shocker from Switzerland.
Doctor Death has the ability to assume the form of the squid-like cyborg Ikadevil (イカデビル, Ikadebiru), which he claims is his greatest creation.
[20] In Kamen Rider × Kamen Rider W & Decade: Movie War 2010, the black ShinigamiHakase Memory, given to him by his longtime friend, Ryubee Sonozaki, transforms him into Super Doctor Death (スーパー死神博士, Sūpā Shinigami-hakase), though his official name is the ShinigamiHakase Dopant (死神博士・ドーパント, Shinigami-hakase Dōpanto), the leader of Super Shocker against his will due to the influence of the Gaia Memory.
[24][25] In the World of Hibiki, she assists Ouja in summoning a Bakegani to be used on Decade as Gyuki was not getting the job done, placing her overall goals further into question.
[7][8] Arranging a meeting with Natsumi, Narutaki proceeds to tell her that her dreams are tied to the Rider War that will awaken Decade's true nature.
[34][35][36][37] In Kamen Rider Decade: The Last Story, Narutaki poses as Colonel Zol (ゾル大佐, Zoru Taisa), an executive member of the evil Super Shocker organization.
However, when Doras fell from the Super Crisis Fortress and knocks him out of his way, he reverts to Narutaki and curses Decade for causing a new calamity born from the Neonoid's antics before running off into another dimension.
He was defeated by the card-using Kamen Riders using the Goseigers' Tensou Cards before he reverts to Narutaki as he curses Decade again before departing into another dimension.
He gave Kota a Rainbow Pass, tells him to give the Conductor and Ticket his regards and leaves, but not before cryptically warning him and Right about an inevitable war between Kamen Riders.
Both groups of villains are defeated after Tsukasa and Marvelous reveal to them that they knew about their scheme all the time, having the heroes they supposedly "destroyed" sent to an alternate dimension and summoned back all together for the final battle with them.
He normally assumes the form of a man called Guy (ガイ, Gai) until he invokes "Apollo Change" (アポロチェンジ, Aporo Chenji).
As a result of his transformation, he now becomes Super Apollo Geist (スーパーアポロガイスト, Sūpā Aporo Gaisuto) with the ability to remove other realities from existence.
Later revived during the events of Super Hero Taisen, Apollo Geist is destroyed again by Kamen Rider Fourze in Magnet States.
[16][17][22][23] Kamen Rider Kaixa reappears briefly in later airings of the series finale, using his Side Basshar to attack Decade and Wataru's group.
[34][35] He then appears before Asumu, Wataru, Yusuke Onodera, and Daiki Kaito and says that their true enemy is Tsukasa, using them to force him to leave while he can or destroy him if he refuses.
It is noteworthy that Kenzaki is able to transform directly to King Form using just the Change Beetle card alone as the belt now uses Kamen Rider Leangle's "Open Up!"
Instead, it would be Kazuma Kendate, Kenzaki's alternate reality version to help Tsukasa and the rest of the Kamen Riders in the battle against Super Shocker, assuming King Form with Decade's K-Touch.
This allows her to become High Priestess Bishium (大神官ビシュム, Daishinkan Bishumu), whom Shadow Moon manipulated to hate Tsukasa and turn Yusuke into her puppet.
For unknown reasons, Yuki rebels against Dai-Shocker and is punished when the organization's leader at the time, Tsukasa Kadoya, orders the amputation of his arm.
The original Joji Yuki is the alter ego of Riderman (ライダーマン, Raidāman), who appears later in the All Riders vs. Dai-Shocker film.
After Dai-Shocker's alliance with Dai-Zangyack is revealed, Jark is once again defeated along Shadow Moon by the combined forces of Kamen Rider Black and the Maskmen.
Like her namesake from Kamen Rider Stronger, Yuriko has the ability to transform into Electro-Wave Human Tackle (電波人間タックル, Denpa Ningen Takkuru).
It is said that she died in a fight with Wasp Woman years in the past but due to having never found her place in the world, she still searches for it even in death.
Its personality is extremely childish and somewhat sadistic, though it appears it doesn't realize the true nature of what its doing, referring to its attacking the Kamen Riders as 'playing'.