Kamen Rider Zi-O: Over Quartzer

Kamen Rider Zi-O: Over Quartzer (劇場版 仮面ライダージオウ Over Quartzer（オーヴァー クォーツァー）) is the Summer film adaptation of Kamen Rider Zi-O, set to double-bill with , while serving as a tribute to Kamen Rider Drive, as well as the Heisei era period of Kamen Rider. In the film, Sougo comes face-to-face with the Quartzers, who intend to wipe Kamen Rider Drive from history and conspire against his kingship.

Synopsis
The Quartzers, calling themselves the Wardens of Time, appear after Sougo Tokiwa collected all of the Heisei Ridewatches. A grand conspiracy behind the birth of the King of Time becomes clear...

Continuity and Placement

 * Kamen Rider Zi-O: This movie serves as an alternate ending after episode 43.
 * If this movie is canon, it must take place after second half of episode 44 but before episode 47, as Sougo said he hasn't officially obtained the Drive Ridewatch in episode 44 and Geiz mentioned Go Shijima in episode 47. However, the movie appears to be non-canon because the events between the episodes are tightly packed together, there are no gap for the movie to fill in, though these inconsistencies could be due to the Quartzer altering the timeline at the end of the movie.
 * Kamen Rider Zero-One: This movie may or may not be related to the series' events as Zero-One's appearance was actually a dream Sougo saw, like before.

Plot
Sougo Tokiwa, Geiz, Tsukuyomi and Woz receive a call from Krim Steinbelt. He asks them to protect his ancestor that is threatened by an unknown enemy. Because if his ancestor perished, so does he, and the history of Kamen Rider Drive will disappear as result.

Sougo and his friends go to 1575, in the Sengoku period. In there, they meet Oda Nobunaga, the revered demon king. But instead, Nobunaga is a weak-willed lecher. Nobunaga tries to court a foreign woman named Clara Steinbelt, Krim's ancestor. So, they must protect the woman.

Suddenly, the enemy appears in the form of Kagen (Kamen Rider Zonjis) and Jogen (Kamen Rider Zamonas). As Sougo and his friends fight them, Go Shijima arrives from the future to assist. After successfully repelling the enemies, Go tells them the history of Kamen Rider Drive.

Later, a war breaks out. As Nobunaga is too scared to lead his army, Geiz took his place instead. Zamonas and Zonjis also appear in the midst of the enemy's army, they brought out Time Mazines too. Sougo, Woz and Go fight them and win. After that, they come back to 2019, Krim and Go hand Sougo the Drive and Mach Ridewatches respectively. With that, all 20 Heisei Ridewatches are collected.

Suddenly Woz stole all the Ridewatches. When the rest confront him, he summons a platform full of people with the same outfit as him, and introduce themselves as the Quartzer. They're the controllers of history, with the leader, SOUGO Tokiwa himself. SOUGO transforms into Kamen Rider Barlckxs and defeats Sougo in his GrandZi-O form, capturing him.

In prison, Sougo asks why Woz betrayed him. The prophet of future answers that his loyalty is always to Sougo, the leader of Quartzer from the Original Timeline. An enraged Geiz attacks Woz and they fight fiercely, but it's a distraction while Tsukuyomi and Go release Sougo.

In the middle of a city, SOUGO declares his true goal: to converge the present Sougo's world with his homeworld, erasing the current Heisei era. He opens a time-space portal to take everyone into his homeworld, and even Sougo is taken.

But Sougo arrives in a strange dimension instead. He saw his past memories as a kid, with his parents. His younger self declares that he'll become a king in the future. It turns out to be an illusion as Sougo suddenly appeared in a deserted wasteland, in 2068. In there, he is greeted by Ohma Zi-O himself. The future demon king explains that SOUGO is from a different timeline, and reaffirm that yes, he is from Sougo's future. However, Ohma Zi-O can't let SOUGO interrupt his future, so he asked his younger counterpart, about what being a King to him is. Satisfied with Sougo’s reply, he lends his power to Sougo: the Ohma Zi-O Ridewatch. With that, he sends Sougo back to his world. Sougo transforms into Zi-O Ohma Form as a gigantic projection of Ohma Zi-O appeared behind him. Witnessing this, Woz does his usual speech as Zi-O landed in front of Zonjis and Zamonas.

Zi-O Ohma Form then proceeds to summon all Heisei Kamen Riders from all the histories, including the ones that only appeared in stage plays, mini series and even manga adaptations. They all help to fight the army of Kasshines that appeared across the city. Witnessing Sougo’s quality as the one true king, Woz renounces his Quartzer membership in front of SOUGO before he tore his Oma Advent Calendar apart, stating that history is not set in stone, and that he belonged to the Heisei Riders. With the destruction of his beloved book, the pages fly into space and alters the portal functions. The Dai-Mazines that appeared in the space lose their power sources and fell like meteors and all 19 Heisei Kamen Riders proceed to assume their final forms.

Just as Woz revels in the Heisei Riders victory, Barlckxs throws his Quarcane and fatally wounded Woz. Geiz then appeared to support Woz and declared for everyone to stand with their True King. Witnessing Zi-O Ohma Form gallantly battling with Barlckxs and succeeded in destroying the remaining Dai Mazines, Woz passed away. The Heisei Riders also successfully defeats Zonjis and Zamonas. Cornered, Barlckxs then uses Kamen Rider Black RX BioRider and J's Ridewatch to transform into a liquefied giant and attacking all Heisei Riders present. However, Sougo remains defiant. He, with all Heisei Riders then use their combined Rider Kicks and penetrated Barlckxs last shield (a gigantic, liquefied board) and deals the finishing blow. In disbelief, Barlckxs shows the damaged board, now imprinted with Heisei in Kanji before exploding, killing the Leader of Quartzer for good.

With the defeat of Barlckxs, Geiz and Tsukuyomi disappeared because the future of Ohma Zi-O is changing (as Sougo gains his power) in good terms. But, the Quartzer appear before Sougo and returns history to its true path, restoring Geiz, Tsukuyomi, Woz and even Ohma Zi-O. They come back to 95 DO happily.

Some day after that, Sougo has a dream of seeing a future Rider: a chartreuse yellow Rider with a grasshopper motif...

Allies

 * Tsukuyomi
 * Oda Nobunaga
 * Gyuzo
 * Clara Steinbelt
 * Pietro

Quartzer

 * Kasshine

Main Cast

 * Sougo Tokiwa (常磐ソウゴ): So Okuno (奥野 壮)
 * Geiz Myoukouin (明光院 ゲイツ): Gaku Oshida (押田 岳)
 * Tsukuyomi (ツクヨミ): Shieri Ohata (大幡 しえり)
 * Woz (ウォズ): Keisuke Watanabe (渡邊 圭祐)
 * Junichiro Tokiwa (常磐 順一郎): Katsuhisa Namase (生瀬 勝久)
 * Ziku-Driver, Ridewatch, Ohma Zi-O Voices: Rikiya Koyama (小山 力也)
 * Ziku-Driver Voice: Yohei Onishi (大西 洋平)
 * BeyonDriver Voice: AFRO (アフロ)

Guest Cast

 * SOUGO Tokiwa (常磐 SOUGO (ソウゴ)): ISSA
 * Kagen (カゲン): Papaya Suzuki (パパイヤ鈴木)
 * Jogen (ジョウゲン): Syuusuke Saito (斉藤 秀翼)
 * Oda Nobunaga (織田 信長): Tomoya Maeno (前野朋哉)
 * Gyuzo (牛三): Jiei Wakabayashi (若林時英)
 * Clara Steinbelt (クララ・スタインベルト): Eru Aoba (蒼葉える)
 * Takeshi Kinashi (木梨猛): Noritake Kinashi (木梨憲武)
 * Sotaro Tokiwa (常磐 宗太郎): Keizo Nagashima (永島敬三)
 * Namie Tokiwa (常磐 奈美恵): Shoko Imayoshi (今吉 祥子)
 * Pietro (ピエトロ): Caleb Bryant (ケイレブ・ブライアント)
 * Quartzer Member: DA PUMP (YORI, TOMO, KIMI, U-YEAH, KENZO, DAICHI)
 * Sougo Tokiwa (Child): Haru Takagi (高木波瑠)

Returning Cast

 * Go Shijima (詩島 剛): Yu Inaba (稲葉 友)
 * Krim Steinbelt (クリム・スタインベルト): Chris Peppler (クリス・ペプラー)


 * Voice recordings from past series
 * Kamen Rider Kuuga (仮面ライダークウガ): Joe Odagiri (オダギリ ジョー)
 * Kamen Rider Agito (仮面ライダーアギト): Toshiki Kashu (賀集 利樹)
 * Kamen Rider Ryuki (仮面ライダー龍騎): Takamasa Suga (須賀 貴匡)
 * Kamen Rider Faiz (仮面ライダーファイズ): Kento Handa (半田 健人)
 * Kamen Rider Blade (仮面ライダーブレイド): Takayuki Tsubaki (椿 隆之)
 * Kamen Rider Hibiki (仮面ライダー響鬼): Shigeki Hosokawa (細川 茂樹)
 * Kamen Rider Kabuto (仮面ライダーカブト): Hiro Mizushima (水嶋 ヒロ)
 * Kamen Rider Kiva (仮面ライダーキバ): Koji Seto (瀬戸 康史)
 * Kamen Rider Decade (仮面ライダーディケイド): Masahiro Inoue (井上 正大)
 * Kamen Rider Double (仮面ライダーダブル): Renn Kiriyama (桐山 漣), Masaki Suda (菅田 将暉)
 * Kamen Rider OOO (仮面ライダーオーズ): Shu Watanabe (渡部 秀)
 * Kamen Rider Fourze (仮面ライダーフォーゼ): Sota Fukushi (福士 蒼汰)
 * Kamen Rider Wizard (仮面ライダーウィザード): Shunya Shiraishi (白石 隼也)
 * Kamen Rider Gaim (仮面ライダー鎧武 [ガイム]): Gaku Sano (佐野 岳)
 * Kamen Rider Zangetsu (仮面ライダー斬月): Yuki Kubota (久保田 悠来)
 * Kamen Rider Drive (仮面ライダードライブ): Ryoma Takeuchi (竹内 涼真)
 * Kamen Rider Brain (仮面ライダーブレン): Shota Matsushima (松島 庄汰)
 * Kamen Rider Ghost (仮面ライダーゴースト): Shun Nishime (西銘 駿)
 * Kamen Rider Ex-Aid (仮面ライダーエグゼイド): Hiroki Iijima (飯島 寛騎)
 * Kamen Rider Build (仮面ライダービルド): Atsuhiro Inukai (犬飼 貴丈)

Ridewatches

 * Watch used:
 * Zi-O
 * Zi-O, Zi-O Ridewatch II, GrandZi-O, Ohma Zi-O
 * Geiz
 * Geiz, GeizRevive
 * Barlckxs
 * Barlckxs, Biorider, J
 * Zonjis
 * Zonjis
 * Zamonas
 * Zamonas
 * Rider Armor(s) used:
 * Zi-O
 * Zi-O II, GrandZi-O, Ohma Form
 * Geiz
 * GeizRevive Shippu, GeizRevive Goretsu
 * Kamen Rider(s) summoned in GrandZi-O/Zi-O Ohma Form:
 * Ryuki, Faiz, Den-O Sword Form, Kiva, Double CycloneJoker, Gaim Orange Arms, Drive Type Speed
 * Weapon(s) summoned in GrandZi-O/Zi-O Ohma Form:
 * Saikyo Zikan Girade

Miridewatches

 * Watch used:
 * Woz
 * Woz, Ginga, Shinobi
 * Futurering(s) used:
 * Woz
 * Woz GingaWakusei, Futurering Shinobi

Signal Bikes

 * Bike Used:
 * Form Change: Signal Mach
 * Signal Exchange:
 * Form Used:
 * Mach

Advent Cards

 * Cards Used:
 * Ryuki: Survive

Rider Cards

 * Cards Used:
 * Kamen Rider Decade
 * Kamen Ride: Decade
 * Final Kamen Ride: Decade
 * Forms Used:
 * Complete Form

Gaia Memories

 * Kamen Rider Double
 * Soul: Cyclone
 * Body: Joker
 * Other: Xtreme

Lockseeds

 * Kamen Rider Gaim
 * Lockseeds Used:
 * Orange, Kachidoki, Kiwami
 * Arms Used:
 * Orange Arms, Kiwami Arms
 * Kamen Rider Zangetsu
 * Lockseeds Used:
 * Kachidoki
 * Arms Used:
 * Kachidoki Arms

Shift Cars

 * Kamen Rider Drive
 * Shift Cars Used:
 * Shift Speed, Shift Tridoron
 * Type Used:
 * Type Speed, Tyoe Tridoron

Rider Gashats

 * Kamen Rider Ex-Aid:
 * Gashats Used:
 * Mighty Action X, Maximum Mighty X, Hyper Muteki
 * Level Used:
 * Action Gamer Level 2, Muteki Gamer

Fullbottles

 * Kamen Rider Build:
 * Biotic: Rabbit
 * Abiotic: Tank
 * Other: Genius

Progrise Keys

 * Key Used:
 * Rising Hopper, Flying Falcon
 * Form Used:
 * Rising Hopper, Flying Falcon

Theme song

 * P.A.R.T.Y. ~Universe Festival~, by DA PUMP

Errors

 * Instead of inserting Rider Pass into DenKamen Sword, Den-O accessed Liner Form by dialing K-Taros, a method used for accessing Climax Form by Imagin.