The Machine Kivaa is Kiva's personal Honda Shadow 750 motorcycle given by Kivat and is said to have been made by Motobat the 16th, master craftsman of the Kivat Race. The Kivaa is a living motorcycle, possessing the brain of a horse monster in its upper cowl. When running at high speed, it generates the Shadow Veil to hide itself from plain sight. The Kivaa can be powered up through the use of the Buroon Fuestle.
The Super-Attaching Combination Buroon Booster is what happens when Buroon envelopes the Kivaa, allowing it to perform wheelies and reach greater speeds. When running at high speed, it generates the Air Break Field with the Shadow Veil and reduces air resistance to almost 0.
Castle Doran is Kiva's base of operations which is of the Wyvern-like Doran Race. Though originally called the Great Wyvern, the Fangire 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 Fangire, 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 Fangire that Castle Doran devours. In battle, Castle Doran can use Magic Missiles, firing the towers on its castle, and spit out Pod Shoots 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.
Shoodoran is a smaller dragon that is hidden in nature as a windmill until summoned by a distress roar of Castle Doran, since it is too young to hear the sound of a Fuestle. Although it was originally a child of the Great Wyvern, the Fangire captured it and bonded it to the mold of a windmill as a scout and bomber. When it comes to battle, Shoodoran perches atop Castle Doran, allowing it to fight at full power. Like Castle Doran, Shoodoran seals the souls of defeated Fangire Race members by eating their bodiless souls. Its attacks are Pod Batting, Doran Bomb Shoot, and Doran Blow.
The Ixalion is Ixa's personal Honda CBR1000RR motorcycle, a MotoGP style bike, dubbed as the "Stallion" to his White Knight motif.
The Powerd Ixer is Ixa's mechanical dragon developed by the Wonderful Blue Sky Organization as a means to combat a Sabbat, and Kiva's Castle Doran. Piloted by Ixa, the Ixer's mouth functions as a robotic arm to either fling Sabbats and Castle Doran around or like a catapult to launch orbs at an enemy. Although only half as large as Castle Doran, it has proven to be both a formidable ally and nuisance to it. The arm can also propel Ixa towards a Sabbat, enabling him to perform a highspeed Rider Kick.