Castle Doran

Castle Doran (キャッスルドラン) is Kiva's base of operations which is of the Wyvern-like Doran Race (ドラン族).

History
Though originally called the Great Wyvern (グレートワイバーン), the Fangires captured it and bonded it to the mold of a castle so it would serve as the base of the Checkmate Four. Wataru eventually became its master through Kivat from his mother Maya. While dormant, it assumes the form of a building to conceal itself in plain sight, invisible to ordinary people.

When exposed to moonlight, or when Kiva performs his finishing move or uses the Doran Fuestle, Castle Doran awakens and assumes its true form. Due to its unique abilities of sealing defeated Fangires, Castle Doran is home to the Arm Monsters, who are in now servitude of Wataru while being maintained on the Life Energy of the sealed Fangires that Castle Doran devours. In battle, Castle Doran can use Magic Missiles (マジックミサイル), firing the towers on its castle, and spit out Pod Shoots (ポッドシュート) from its mouth. Castle Doran also possesses the power to transcend time and space, first showing the ability in Kamen Rider Den-O & Kiva: Climax Deka when aiding Kiva, Den-O and Zeronos in the battle against the Nega Den-Liner.

Castle Doran can use this very same power in the form of the Time Door, which is rarely used as it would summon or send any person from or into any moment in the past, serving as a bridge between the two timelines of 1986 and 2008.

World of the Rider War
to be added

World within the Magic Stone
During the 14 Heisei Kamen Riders' battle against Amadum's monsters in the World within the Magic Stone, when various giant and flying monsters appeared, Kiva boarded Castle Doran, fighting alongside the other Riders pulling off their various tricks and attacking Cancer Supernova by breathing fire.

Stats

 * Height: 32m
 * Length: 41m
 * Weight: 18,000t
 * Estimated age: 320 years old (32 in dragon years)
 * Maximum walking speed: 80km/h
 * Flight speed: 120km/h

A.R. World
Castle Doran also exists in the A.R. World of Kiva. The backdrop in the Hikari Studio that allows entry into the World of Kiva depicts a nighttime cityscape with Castle Doran emerging from a building. Wataru reunited with Ixa and Kamen Rider Saga (A.R. World) in front of Castle Doran when the World of Kiva was restored following the Rider War.

Fuestles
There are two Doran Fuestles (ドランフエッスル), in the possession of Kamen Riders Kiva and Dark Kiva respectively. Kiva uses his Doran Fuestle to summon Castle Doran. Dark Kiva would be able to use his Doran Fuestle to do the same, however, it was never used.