Ridewatches

The Ridewatches (ライドウォッチ) are pocketwatch-like devices that contain the power of past Kamen Riders, used by the Riders in Kamen Rider Zi-O.

Overview
Ridewatches are armament devices designed like stopwatches that are the power sources for Ridewatch-compatible Rider Systems. Once created, they infuse the previous Kamen Rider's powers along with their memories as well as the history of their monsters as well.

Creation

 * 1) Confirm that an Another Rider exists during the present day.
 * 2) Meet the Rider in which the Another Rider is based on.
 * 3) The veteran Rider will return the Ridewatch to the user and ask them to protect their wishes.
 * 4) Return to the past and defeat the Another Rider.
 * 5) Give the veteran Rider(s) a blank Ridewatch, in which they will later manifest when the user returns to the present day to receive them in Step 3. This is the start of a time loop in which the veteran Riders lose their memories from this point on and will temporarily regain them as Sougo approaches them in 2018.
 * 6) *According to Woz's opening narration in episode 2, the Ridewatches actually "steal" the powers of past Riders along with their entire existence as Riders from time. This presents a sinister aspect to their creation, as Riders lose their memories and powers upon Zi-O or Geiz's first activation of the respective RideArmor.
 * 7) **In episode 5, it's revealed Ridewatches not just steal the history of Riders, but also their villains, effectively erasing all conflict from time and preventing a much more imminent bad future from forming.

Design
A normal Ridewatch consists of the following parts:
 * Ride On Starter (ライドオンスターター) - The activation button on top of the Ridewatch. Turning it on will shift the Ridewatch to a standby state before inserting it into the Ziku Driver. Pressing it again will allow the Rider to execute a finisher.
 * Outrigger Grip (アウトリガーグリップ) - The overall exterior body of the Ridewatch. The shape stabilizes the rotation motion of the Wake Bezel and loading of Ridewatch into the Ziku Driver.
 * Wake Bezel (ウェイクベゼル) - The dial of the Ridewatch. It is an energy release valve. By rotating it from its sleep state, which displays the Rider symbol and corresponding year date (in A.D.), to its active state, the Ridewatch becomes active, which displays the full face of the Rider.

The Decade Ridewatch consists of the following parts:
 * Ride On Starter (ライドオンスターター) - The activation button on top of the Decade Ridewatch. Turning it on will shift the Ridewatch to a standby state before inserting it into the Ziku Driver. Pressing it again will allow the Rider to execute a finisher.
 * Progress Cylinders (プログレスシリンダー) - Two cylindrical units located between the Decade Ridewatch's 'face' and Ridewatch slot. It 'upgrades' an inserted Ridewatch's powers, allowing transition into that respective Ridewatch's Rider's upgrade or super form.
 * Ride Canceller (ライドキャンセラー) - A black device located at the far right end of the Decade Ridewatch. It is a sort of security device that forcibly ejects Ridewatches connected to the Decade Ridewatch.
 * Pict Window (ピクトウィンドウ) - The main monitor that takes the form of Kamen Rider Decade's face. It can holographically display information such as time and Ridewatch icons.
 * Groove Bezel (グルーブベゼル) - The Decade Ridewatch's reinforced outer frame, complete with Kamen Rider Decade's signature 'face bars'. It reinforces the Ridewatch and protects it from shock.
 * Wide Outrigger Grip (ワイドアウトリガーグリップ) - The Decade Ridewatch's entire outer exterior. It's shape stabilises the Ziku Driver's loading operation by letting the fingers of the Rider (when held) act as a boom (moving arm).
 * F.F.T. Slot (F.F.T.スロット) - A slot to attach Ridewatches to upgrade the Decade Armor.

Functionality
The Wake Bezel is turned 90 degrees clockwise, causing its arrow to face the direction that it is inserted into the respective slot on the Ziku-Driver. It activates when the Ride On Starter is pressed, and it is inserted into its corresponding slot on the Ziku-Driver before it was rotated 360 degrees to transform. Zi-O and Geiz 's personal Ridewatches are inserted into the D '9 Slot to access their base forms, and Ridewatches based on past Kamen Riders are inserted to the D '3 Slot to access Rider Armor forms based on those Kamen Riders.

List of Ridewatches
{{#tag:tabber| Personal= {{#tag:tabber| Zi-O= {{#tag:tabber| Zi-O= {{#tag:tabber| 1={{Quote|(Digital beeping) Zi-O!|Activation announcement|Kamen Rider Zi-O}} {{!}}-{{!}} 2={{Quote|{{nihongo|The clock Rider who uses Ridewatches to fight is... (Clock ticking noise) Zi-O!|ライドウォッチで戦う時計のライダーは…ジオウだ！|Raidowotchi de tatakau tokei no Raidā wa... (Clock ticking noise) Jiō da!|}}|Secondary activation announcement|Kamen Rider Zi-O}} {{!}}-{{!}} 3={{Quote|{{nihongo|The Kamen Rider of 2018 who unfolds the fight with historical Riders is...(Clock ticking noise) Zi-O!|歴代ライダー達と戦いを繰り広げる2018年の仮面ライダーは…ジオウだ！|Rekidai Raidā-tachi to tatakai o kurihirogeru ni sen jū hachi-nen no Kamen Raidā wa... (Clock ticking noise) Jiō da!|}}|Secondary activation announcement (Climax Scramble Zi-O ver.)|Kamen Rider Zi-O}} {{!}}-{{!}} 4={{quote|{{nihongo|Congratulations! The lucky owner who gets this special Ridewatch is...you!|コングラチュレーション！このスペシャルなライドウォッチを手に入れた幸運の持ち主は…君だ！|Kongurachurēshon! Kono supesharu na Raidowotchi o te ni ireta kōun no mochinushi wa...kimi da!}}|Secondary activation announcement (Aurora Plating ver.)|Kamen Rider Zi-O}} {{!}}-{{!}} 5={{Quote|Time Mazine!|Time Mazine summoning announcement|Kamen Rider Zi-O}} {{!}}-{{!}} 6={{Quote|Rider Time! (Electronic beat) Kamen Rider Zi-O!|Transformation announcement|Kamen Rider Zi-O}} {{!}}-{{!}} 7={{Quote|Finish Time! Time Break!|Finisher announcement|Kamen Rider Zi-O}} }}
 * {{nihongo|Zi-O Ridewatch|ジオウライドウォッチ|Jiō Raidowotchi}}: The personal Ridewatch of Kamen Rider Zi-O accesses his default form. It is dated 2018 AD.
 * In the Climax Scramble ver., the screen will show "GAME" instead of "Zi-O" and "2018"

{{-}} }}

Unused Ridewatches
The DX Ziku-Driver toy can be hacked via pin combinations to reveal the names of possible Ridewatches with no confirmation on their appearance in the show, listed as follows:

Portrayal
The Ridewatches are voiced by Rikiya Koyama (小山 力也), who previously voiced Paradox Roidmude in Kamen Rider Drive: Surprise Future, Kamen Rider Bujin Gaim in Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle and physically portrayed Joe the Haze in Kamen Rider Black RX. He also voiced other equipment in Kamen Rider Zi-O, and Oma Zi-O himself. The various Legend Rider forms recycle audio from the original Riders' transformation announcements, reusing the sounds and lines voiced by other Rider Equipment Voice Actors.
 * BuildArmor's transformation announcement reuses the Build Driver's "Best Match" announcement voiced by KORBY.
 * Inserting the Cross-Z Ridewatch likewise reuses the "Wake up, burning!" from the Cross-Z Dragon.
 * The Grease and Rogue Ridewatches reuse their Sclash Drivers' respective "Robot Jelly" and "Crocodile" by Norio Wakamoto.
 * The Evol Ridewatch reuses the Evol-Driver's "Evolution" by Tetsuo Kanao.
 * Ex-AidArmor and GenmArmor's transformation announcement reuses the Rider Gashats' "Level up!" announcement voiced by Hironobu Kageyama.
 * The same is true of the Ridewatches for Brave, Snipe, and Lazer. The Para-DX Ridewatch instead reuses the "Mazaru up!" announcement from the Gashat Gear Dual.
 * GhostArmor and SpecterArmor's transformation announcement reuses the Ghost Driver's "Kaigan!" announcement voiced by m.c.A·T.
 * DriveArmor's transformation announcement reuses the Drive Driver's "Drive!" announcement voiced by Chris Peppler.
 * The Mach and Chaser Ridewatches reuse their name announcements from the Mach Driver Honoh, speculated to be voiced by George Williams.
 * GaimArmor's transformation announcement reuses the Sengoku Driver's "Soiya!" announcement voiced by Seiji Hiratoko.
 * WizardArmor's transformation announcement reuses the WizarDriver's "Please" announcement, speculated to be voiced by Wizard narrator Hiroaki Hirata.
 * The Beast Ridewatch reuses the "Open" from the Beast Driver.
 * FourzeArmor's transformation announcement reuses the Fourze Driver's 3-2-1 countdown.
 * The Meteor Ridewatch reuses the Meteor Driver's "Meteor, ready?" announcement.
 * OOOArmor's transformation announcement reuses the OOO Driver's "Taka! Tora! Batta!" announcement voiced by Akira Kushida.
 * The Ridewatch for the Tajadol variant likewise uses the "Taka! Kujaku! Condor!"
 * The PuToTyra Ridewatch similarly uses the "Ptera! Torikera! Tyranno!"
 * DoubleArmor's transformation announcement reuses the Gaia Memories' "Cyclone! Joker!" announcement voiced by Fumihiko Tachiki.
 * DecadeArmor's transformation announcement reuses the Decadriver's "KamenRide!" announcement voiced by Mark Okita.
 * KivaArmor's transformation announcement reuses Kivat-bat the 3rd's "Gabu!" announcement voiced by Tomokazu Sugita.
 * Den-OArmor's transformation announcement reuses the Den-O Belt's "Sword Form!" announcement.
 * Likewise, the Zeronos Ridewatch reuses the "Altair Form!" announcement from the Zeronos Belt.
 * KabutoArmor's transformation announcement reuses the Kabuto Zecter's "Change Beetle!" announcement voiced by Surage Gajria.
 * BladeArmor's transformation announcement reuses the Blay Buckle's "Turn Up!" announcement voiced by Takeshi Sasaki.
 * FaizArmor's transformation announcement reuses the Faiz Phone's "Complete!" announcement voiced by Takehiko Kano, as does the Kaixa Ridewatch with an additional "Standing By..." announcement from the Kaixa Phone.
 * RyukiArmor's transformation announcement reuses the Drag Visor's "Advent!" announcement voiced by Tsuyoshi Koyama.