Rider Great Assembly! Revealing the Mystery of the Forest!

is the tenth episode of Kamen Rider Gaim. It features the TV debut of Ryugen Kiwi Arms following its first appearance in Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle, as well as the debut of Takatora Kureshima's first on-screen transformation into Kamen Rider Zangetsu.
==Synopsis==
Kouta and Mitsuzane begin to postulate on the identity of the white Armored Rider who seems to be destroying all evidence of the Inves entering their dimension. To try to figure out what should be done about both the Inves and the white Rider, Kouta decides to consult with the other Armored Riders
==Plot==
Christmas is fast approaching and while doing a part time job, Kouta finds two Inves attacking a woman and rescue her before finishing them. With the increasing incidents involving the Inves, Kouta and Mitsuzane decide to investigate the Helheim Forest to look for clues, but they must beware of the white Armored Rider. Mitch then comes up with an idea, by inviting Kaito, Ryoji and Hideyasu for a game in the forest, with the team catching the most Lockseeds declared as the winner. As Team Gaim is the only team with two Riders, Kouta agrees to sit out of the game, as his true intention is to have the other Riders distracting the white Rider and his minions while he looks for clues about the Inves and Yuya's whereabouts. To give Ryoji and Hideyasu access to the forest, the Riders convince Sid to provide them some Lock Vehicles but he claims that he will have them ready by Christmas. Mai gets angry at Kouta and Mitch for proposing such game just when Team Gaim is on top of the rankings but they calm her down, claiming that it is necessary for them to learn the truth about the Inves and they promise to will return in time for their Christmas party. On the day of the game, the Riders are about to start when Oren appears, convincing them to join after he reveals that he also possesses a Lock Vehicle. However, once several Inves appear before them, Kamen Rider Baron runs ahead of the others to the forest to have an advantage, with Bravo following soon after. To delay Ryugen further, Kurokage and Gridon feed a Himawari Lockseed to an Inves to strengthen it and rush to the forest as well. With all other Riders away, Gaim appears to assist Ryugen who fights the Inves as the new Armored Rider Ryugen Kiwi Arms and instructs him to run after the others. Before leaving, Ryugen lends Gaim the Suika Lockseed to help him dispose of the enemies. Upon knowing of the Riders appearing at the Helheim Forest, Takatora transforms into Armored Rider Zangetsu as he is about to depart there as well.
==Cast==
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*: KANON
*: MIINA
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===Guest cast===
*Mother: 
*Child: 
*Researcher: 
==Lockseeds==
*Lock Used:
**Gaim:
***Orange, Suika, Sakura Hurricane
**Baron:
***Banana, Rose Attacker
**Ryugen:
***Budou, Kiwi, Rose Attacker
**Zangetsu:
***Melon
**Gridon:
***Donguri, Rose Attacker
**Kurokage:
***Matsubokkuri, Sakura Hurricane
**Bravo:
***Durian, Sakura Hurricane
*Arms Change:
**Gaim:
***Orange Arms, Suika Arms
**Baron:
***Banana Arms
**Ryugen:
***Budou Arms, Kiwi Arms
**Zangetsu:
***Melon Arms
**Gridon:
***Donguri Arms
**Kurokage:
***Matsubokkuri Arms
**Bravo:
***Durian Arms
*Lock Vehicle:
**Gaim:
***Sakura Hurricane
**Baron:
***Rose Attacker
**Ryugen:
***Rose Attacker
**Gridon:
***Rose Attacker
**Kurokage:
***Sakura Hurricane
**Bravo:
***Sakura Hurricane
==Notes==
*As part of Super Hero Time, this episode aired alongside episode 41 .
*Viewership: 6.1%
*Closing Screen Lockseed Collection:
**Kamen Rider: Ryugen
**Lockseeds: LS-09 Budou, LS-13 Kiwi, LV-02 Rose Attacker
*This is the first time that all seven original Armored Riders are seen transforming in one episode.
*The Sakura Hurricane Lockseed held by Oren is much smaller than the prop size (This always happen on all Kamen Rider shows as the actors holds the device are smaller, but as Riders, the device becomes larger). This is because what Oren is holding is the toy version, the DX Sakura Hurricane Lockseed itself.
Tenka Gomen ni Samurai Rider!.png|Takatora's first on screen transformation scene.
DX Sakura Hurricane in Oren's hand.jpg|The DX Sakura Hurricane Lockseed held by Oren is smaller than the prop size...
Actual prop in Baron's hand.jpg|..compared to Baron's Rose Attacker Lockseed, which is the size of the palm.
==DVD releases==
Kamen Rider Gaim Volume 3 features episodes 9-12: The Monster Inves Capture Battle!, Rider Great Assembly! Revealing the Mystery of the Forest!, The Truth Behind the Christmas Game and Genesis Riders Appear! http://www.toei-video.co.jp/DVD/gaimu.html
DSTD08893-d.jpg|Kamen Rider Gaim Volume 3, DVD cover
Gaim DVD Volume 03.jpg|Kamen Rider Gaim Volume 3, Blu-ray cover
==External links==
*TV Asahi's official summary for 「ライダー大集結！森の謎を暴け！」
*Toei TV's official episode guide for 「ライダー大集結！森の謎を暴け！」
==References==
Category:New Form Episode
Category:Christmas Episode