Is the world of the Kamen Rider OOO&W in the movie a parallel world? Did Kazari and Giru already know each other in the world presented in the TV series?

In the movie, W already knew OOO, and OOO had a cameo in the movie, so it should be the real thing. If OOO was in a parallel world, he probably wouldn't recognize W. Then, was OOO in the World War Core parallel? And TaJaDol appeared long ago
And Giru also appeared. Goto used Birth when Ida didn't appear.

Answer 1

"The Inheritor of the Masked Rider" is a light novel written by the author, Huang Shan Gongju. It is a derivative Doujinshi novel. The general plot of this novel is as follows:

He traveled with the identity of the Kamen Knight Blade to seal the Undead that was scattered in various knight worlds.
The story began in Agito's world…
QQ Book Group: 641513095. Friends who like this book or the Masked Rider can join in to discuss and exchange ideas.
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"The Masked Rider's Other King of Time" was a light novel by the author, Mo Xiaoxi 02. The general plot of this novel was:

The main character was Shogo Tokuwawa's twin brother. The system appeared! I'm just a Masked Knight who causes trouble everywhere and a demon king who protects the world! Remember this! The new book, Masked Rider: World Destroyer, has been released! It was as beautiful as ever. Thank you for your support!
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"Armored Warrior in the ACG World" was a light novel by the author, Luo Shen. The general plot of this novel was:

In the world of Sophomore Syndrome, Ye and the hidden armored warrior saved the world, came to GOSICK to abduct Dimensional Bun, fought monsters in the world of Twintail, and smashed the dragon in the world of Zero's demonic spirit…
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"I Can Become a Masked Rider" was a light novel written by the author, Xin Xizhen Shuai. It was a fantasy novel. The general plot of this novel was:

This novel recorded that the ordinary high school student Xin Xi became the king of time in the future. When he met the demon, Xin Xi, the successor of the king, obtained a Masked Knight system. He could become all the Masked Knights in a world without Masked Knights! What was going to happen if the monsters kept attacking? In other worlds, he met other Masked Knights and became friends with them! Slowly, he discovered a shocking conspiracy! Let's celebrate. The King of Time who had crossed over and knew the future, who possessed all the power of the Masked Knight, was born at this moment! 1102195545 and this is my book friend group. If you're interested, add it).
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The Masked Rider of a Marvel was a light novel by the author, Hidden Spirit and Hitomi. The general plot of the novel was:

Let's celebrate!
The knight king who had mastered the power of all knights, crossed the world, and understood the past and the future was called the Masked Rider, decade! Appeared in Marvel.
From then on, there would be a passing figure in every major crisis that destroyed the world.
Destroy everything, connect everything.
At this moment, knights were born.
[PS: Group number 785922610. I created a group of readers. Everyone is welcome to chat, complain, and act cool.]
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The book "Being a Masked Rider in the Infinite Style" was a light novel by the author, Yi Cheng. The general plot of this novel was:

The new books "Dog Spirit Trainer" and "Masked Rider: Dark Glory" are currently being updated. The following is a brief introduction that I don't know if it will appear in the main film. Everyone, take it seriously. "This is the Super Belt. With it, you can defeat all the Gurangis." "Thank you, Yajitu!" "You're welcome, Onodera." "Yitiao Sang, this is the belt that Dongda's mother owes you!" "I'm so weak, don't even think about tricking me into being the second rider!" Even if I was beaten to death by Gurangi and captured by Rose to be the wife of the bandit chief, I wouldn't…It smells so good!" Rose: Omo…"Shoichi Tsugami, open your eyes, I am Guga ~"…Protagonist ability: Masked Rider Void. PS: The protagonist officially obtains the belt in Chapter 97. This book focuses on chivalry. Brother Xiaoming occasionally comes out to save the situation or suffer defeat... Book Group: 884289522 Book World: Resident Evil-Masked Knight Amazons-Acceleration World-Masked Knight Kuuga-Gullit-Masked Knight Agit Omega-Fate-Jojo-Infinite Terror-Armor Warrior-Diga Ultraman-Nexus Ultraman-True Demon High School-DexD-Masked Knight Exaid-Masked Knight Build-Masked Knight ZI-O-Saint Seiya-Coiling Dragon, etc.
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"Masked Rider: I've also become an Ajita" was a light novel written by the author, Ding Zhi. The general plot of this novel was:

New book, Dragon Clan: Lu Mingfei Returning from Hongjing, seeking support! Qin Ming unexpectedly became the Masked Knight Agit Omega, who could evolve infinitely. Therefore, he decided to travel to various worlds and write his own legendary life. Many years later, there were two more ironclad rules in the circle of weirdos-one, don't go out at night, be careful of the high beams! Two, never provoke a woman named Saya! He laughed to death! The Joker is actually me! Shocking! There were actually two Gates Happy Riders? Ridiculous! Why would someone turn on their high beams in broad daylight? Tears! The Masked Rider had once again joined hands with Ultraman to fight the enemy! This is to commemorate the 20th anniversary of the Masked Knight Agit Omega.
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"Heisei Rider's Journey" was a light novel by the author, DiDiGe. The general plot of the novel was:

Gao Yan, who had dreamed of transmigrating, finally realized his dream. However, he came to the world of the masked knight, AGIT Omega. In order to correct history, he set foot on the world of the nineteen knights.
The mysterious Masked Rider System, correcting the wrong history, every different world of the Heisei Knights, different stories are waiting for Gao Yan to face. Congratulations, inherit all the history of the Heisei Masked Rider, and become the true history reviser.
What would Gao Yan see in that infinite future?
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The book "The Masked Rider from the Apartment" was a light novel by the author, Afei the Scarecrow. The general plot of this novel was:

Li Luo, who had transmigrated to iPartment World and successfully moved into the apartment, didn't have time to be happy when he unexpectedly discovered that because of his arrival, the Outlander from Heim's Underworld had also targeted this world.
Faced with the invasion of the Outsiders, Li Luo took out a War Pole Driver from his dimensional pocket.
“Henshin!”
"From today onwards, I am the Masked Knight!
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"Journey to Two-Dimensional Trouble" was a light novel by the author, Lord Handsome Cow. The general plot of this novel was:

In the new book, Tom the Cat Breaking Through the Dimensional Wall, Assassin's Creed, Ezio rode the waves in the Caribbean Sea and fought against the Outer Gods all over the world. In the world of the Masked Rider, let Kaoru Ichijo wear the G3 and become the strongest second rider. They had just been frozen until 1991, but Cheng Long and Xiao Yu had already dug out Captain Mei. Using Pym particles to shrink Godzilla and King Kong, he kept them as pets and threw them out to be his thugs when the Pacific monster appeared. Transforming into the Yu-Gi-Oh Duel, he transmigrated into the world of Digimon and became a child chosen to be summoned. What would happen if the Magic Card Girl Sakurazaka's Wang Xiaoming met the Masked Knight Wang Xiaoming? A hundred years ago, Link had already been able to do whatever he wanted in Hailaruso. What was there to do with Genon? There was also the world of large mechas, Ultraman, and Godzilla. [The more worlds there are, the bigger the hole in your brain.]