Fuestles

Fuestles (フエッスル) is a set of whistles used by the Kamen Riders of Kamen Rider Kiva to access their arsenal. Their name is likely a portmanteau of "flute" (笛) and "Whistle". They are held in Fueslots (フエッスロット).

Kiva's Fuestles
Kiva accesses his arsenal through whistles on his belt called Fuestles, which he gives to Kivat to blow into to evoke a power-up. Three of the Fuestles serve to summon an allied Arms Monster from Castle Doran, who allows for Kiva to Form Change and turns into a weapon. These three Fuestles' powers can be evoked immediately before Wataru transforms, enabling him to transform to the respective form directly without going through Kiva Form.
 * Wake Up (ウエイクアップ): This Fuestle allow Kiva to perform his Darkness Moon Break attack.
 * A different Wake Up Fuestle for the Zanvat Sword is attached to the hilt like a mask and is used to initiate its Final Zanvat Slash attack.
 * Garulu (ガルル): This Fuestle summons Garulu from Castle Doran.
 * Basshaa (バッシャー): This Fuestle summons Basshaa from Castle Doran.
 * Dogga (ドッガ): This Fuestle summons Dogga from Castle Doran.
 * Doran (ドラン): This Fuestle summons Castle Doran.
 * Buroon (ブロン): This Fuestle summons Buroon from Castle Doran and turns the Machine Kivaa into the Buroon Booster.
 * Tatsulot (タツロット): This Fuestle summons Tatsulot from Castle Doran. It is different from Kiva's other fuestles in that it is red instead of transparent and does not appear to be stored on Kiva's belt.

Ixa's Fuestles
Ixa has six Fuestles like Kiva, stored in silver Fueslots. They include:


 * Knuckle (ナックル): This powers up the Ixa Knuckle to become the Broken Fang. When activated, the Ixa Belt announces "Ixa Knuckle - Rise Up" (イクサナックル・ライズアップ) prior to the execution of the Broken Fang finisher, primarily used in 1986.
 * Calibur (カリバー): This powers up the Ixa Calibur in Calibur Mode. When activated, the Ixa Belt announces "Ixa Calibur - Rise Up" (イクサカリバー・ライズアップ) prior to the execution of the Ixa Judgement finisher, primarily used in 2008.
 * Powerd (パワード): This Fuestle summons Powerd Ixer.
 * Garulu Fake (ガルルフェイク): A Fuestle that copies the frequency of Kiva's Garulu Fuestle, with the Ixa Belt announcing "Garulu Fake" as Ixa hijacks the Garulu Saber when it is summoned by Kiva.
 * Basshaa Fake (バッシャーフェイク): A Fuestle that copies the frequency of Kiva's Basshaa Fuestle, allowing Ixa to hijack the Basshaa Magnum when summoned. This Fuestle was not used in the series' run.
 * Dogga Fake (ドッガフェイク): A Fuestle that copies the frequency of Kiva's Dogga Fuestle, allowing Ixa to hijack the Dogga Hammer when summoned. This Fuestle was not used during the series' run.
 * Riser (ライザー): A Fuestle found in the grip of the Ixariser that allows Rising Ixa to perform the Final Rising Blast (ファイナルライジングブラスト) finisher.

Saga's Fuestles
Like Kiva, Saga accesses his arsenal through the Fuestles (フエッスル), which he gives to Sagarc to blow into to evoke a power-up.
 * Wake Up (ウエイクアップ): This Fuestle allow Saga to perform his Snaking Death-Break.

Dark Kiva's Fuestles
Like Kiva, Dark Kiva accesses its arsenal through whistles on its belt called Fuestles (フエッスル), which he gives to Kivat the 2nd to blow into to evoke a power-up. Compared to Kiva's Fuestles, his predecessor's emit at a lower pitch similar to a pipe organ.


 * Dark Wake Up (ダークウエイクアップ): The Dark Wake Up Fuestle allows Dark Kiva to perform one of three finishing moves depending on the frequency.
 * Darkness Hell Crash (ダークネスヘルクラッシュ): Referred to by Kivat-Bat the 2nd as "Wake Up One," the Darkness Hell Crash is a punch with the force of 65t. When performed, day turns into night with blood red fog. Dark Kiva then does a flying punch with his right arm. This Dark Kiva's Rider Punch.
 * King's Burst End (キングスバーストエンド): Referred to by Kivat-Bat the 2nd as "Wake Up Two," the King's Burst End is an Emperor Moon Break-style Rider Kick with the force of 180t and green energy blades.
 * King's World End (キングスワールドエンド): Referred to by Kivat-Bat the 2nd as "Wake Up Three," a self-destructing attack with an unknown level of destructive power. As the name implies, it could destroy everyone nearby. However, it was never used.
 * Garulu-Seal (ガルルシール): This Fuestle seals Garulu by emitting a continuous sound, creating an energy sphere that captures Garulu and converts him into the Garulu Saber.
 * Basshaa-Seal (バッシャーシール): This Fuestle seals Basshaa by emitting a continuous sound, creating an energy sphere that captures Basshaa and converts him into the Basshaa Magnum.
 * Dogga-Seal (ドッガシール): This Fuestle seals Dogga by emitting a continuous sound, creating an energy sphere that captures Dogga and converts him into the Dogga Hammer.
 * Doran (ドラン): This Fuestle summons Castle Doran. However it was never used.
 * Buroon (ブロン): This Fuestle summons Buroon from Castle Doran. However it was never used.

Rey's Fuestles
Rey uses the Key Fuestle (キーフエッスル) to unleash the Gigantic Claw (ギガンティック・クロー).

Arc's Fuestles
Through the use of the Wake Up Fuestle (which resembles Rey's Key Fuestle in the movie), Arc transforms into Legend Arc (レジェンドアーク) by assimulating the demon-eye of the moon to obtain the full power of his race, growing wings and a second set of arms. In the process, Arc Kivat assumes Mecha Kivat (メカキバット) mode as his persona cast comes off and yells, "Go to Hell."