2017: Grand Climax!

2017: Grand Climax! (2017：グランド・クライマックス！) is the fortieth episode of Kamen Rider Zi-O. It is the second part of the Kamen Rider Den-O tribute arc. It features Sougo's first full transformation into GrandZi-O and the second battle between himself and Oma Zi-O.

Synopsis
After obtaining the Den-O Ridewatch, the new GrandZi-O Ridewatch suddenly formed in Sougo's hands! A Ridewatch that contains the strongest of powers: the combined strength of all the past Heisei Riders! However, after Yuto Sakurai and Deneb intervened in the timeline, in order to prevent Sougo from becoming the demonic king of the future, the GrandZi-O Ridewatch disappeared! After returning to 9 5 Do, Sougo and the others realize that Takuya (Another Den-O) strongly wished for something, and once that wish is fulfilled, the contract with the Imagin will be complete, however...

Continuity and Placement

 * Kamen Rider Den-O: After the events of Kamen Rider Heisei Generations FOREVER. However, since Sougo doesn't remember the DenLiner, Another Den-O, and Imagin in the previous episode, the film might as well be non-canon, as previously stated by the show's producer Shinichiro Shirakura.

Plot
"And thus the GrandZi-O Watch, that was just born, vanished. However, this is nothing more than a trial for Sougo Tokiwa to obtain the ultimate power. Plus, the time-traveling train, DenLiner, was stolen by Another Den-O with an Imagin on it's tail... Did they go into the past... or the future?"

- Black Woz

Cast

 * Sougo Tokiwa (常磐 ソウゴ): So Okuno (奥野 壮)
 * Geiz Myokoin (明光院 ゲイツ): Gaku Oshida (押田 岳)
 * Tsukuyomi (ツクヨミ): Shieri Ohata (大幡 しえり)
 * Black Woz (黑ウォズ): Keisuke Watanabe (渡邊 圭祐)
 * Oma Zi-O (オーマジオウ), Ziku-Driver, Ridewatch Voices: Rikiya Koyama (小山 力也)
 * Ziku-Driver Voice: Yohei Onishi (大西 洋平)
 * BeyonDriver Voice: AFRO (アフロ)

Guest Cast

 * Yuto Sakurai (桜井 侑斗): Yuichi Nakamura (中村 優一)
 * Momotaros (モモタロス): Toshihiko Seki (関 俊彦)
 * Urataros (ウラタロス): Kōji Yusa (遊佐 浩二)
 * Kintaros (キンタロス): Masaki Terasoma (てらそま まさき)
 * Ryutaros (リュウタロス): Kenichi Suzumura (鈴村 健一)
 * Deneb (デネブ): Hōchū Ōtsuka (大塚 芳忠)
 * Takuya Endo (遠藤タクヤ): Dai Goto (後藤大)
 * Yukihiro Osumi (大澄ユキヒロ): Norihiro Shige (重徳宏)
 * Sayuri Endo (遠藤サユリ): Yuzuki Akiyama (秋山ゆずき)
 * Mole Imagin (モールイマジン): Akira Sasanuma (笹沼 晃)

Suit Actors

 * Kamen Rider Zi-O, Momotaros: Seiji Takaiwa (高岩 成二)
 * Kamen Rider Geiz: Yuya Nawata (縄田 雄哉)
 * Kamen Rider Woz, Urataros: Eitoku (永德)
 * Kamen Rider Zeronos, Deneb: Masashi Takada (高田 将司)
 * Kintaros: Jirō Okamoto (岡元 次郎)
 * Ryutaros: Toshihiro Ogura (おぐら としひろ)
 * Another Den-O, Oma Zi-O: Kazuya Okada (岡田 和也)
 * Mole Imagin, New Mole Imagin: Yasunari Tsukagoshi (塚越 靖誠)

Ridewatches

 * Watch used:
 * Zi-O
 * Zi-O, GrandZi-O
 * Geiz
 * Geiz, GeizRevive
 * Rider Armor(s) used:
 * Zi-O
 * GrandZi-O
 * Geiz
 * GeizRevive Goretsu, GeizRevive Shippu
 * Kamen Rider(s) summoned in Grand Zi-O:
 * Normal:
 * Build RabbitTank Form, Kuuga Mighty Form, OOO Tatoba Combo, Gaim Orange Arms, Den-O Sword Form (From Den-O Episode 18)
 * All Twenty Time Break:
 * Build Genius Form (From Build Episode 40), Gaim Suika Arms (From Gaim Episode 7), OOO Gatakiriba Combo (From OOO Episode 6), Kuuga Pegasus Form (From Kuuga Episode 24)
 * Weapon(s) summoned in Grand Zi-O:
 * Titan Sword (From Kuuga Episode 10), Fullbottle Buster (From Build Episode 28)

Miridewatches

 * Watch used:
 * Woz
 * Woz, Ginga
 * Futurering(s) used:
 * Woz
 * WozGingaFinaly

Other Form Changes

 * Den-O - Sword Form, Climax Form
 * Zeronos - Altair Form, Vega Form

Errors

 * to be added