Gaia Memories

A Gaia Memory (ガイアメモリ) is a mysterious device resembling a USB flash drive that contains all of the Earth's knowledge of what it represents. This enables its user to become a Dopant, or in some special cases a Kamen Rider. Every Gaia Memory is adorned with the first letter of its name, stylized to reflect the powers it imbues on its user. For example, the Injury Memory (acquired by Shotaro and Philip before the series begins) resembles a broken bone in the shape of the letter I. In order to transform into a Dopant, the Gaia Memory is first inserted into a device called the L.C.O.G (Living Connector Setting Operation Gun), also called a Connect Shooter (コネクトシューター), which then produces a USB port-like tattoo on the user's skin called a Living Connector (生体コネクタ). Whenever the Gaia Memory is pressed onto the Living Connector, it enters the user's body and transforms the user into a Dopant. It is possible to use a Gaia Memory without a Living Connector however a side effect is that the user would later suffer intense physical pain after several uses.

This direct insertion will eventually drive its user insane from its addictive influence, which is why special belts called Memory Drivers (メモリドライバー) have been developed for use by high ranking members of the Museum to filter out these and other side effects. This weakens the Dopant visibly, as such high-ranking Museum members use some of the strongest Gaia Memories, identified by their golden colors, to more than compensate for this weakening. These Gaia Memories seem to be even more dangerous than regular Gaia Memories as hinted in the series. Despite the benefits, there are those who dislike the use of Drivers and would very much prefer the poisoning than being weakened, like Doctor Isaka. It also seems that when used excessively, the user will slightly gain the Gaia Memory`s powers as hinted when Ryubee who held the Terror Memory for at least ten years seemed to be able to intimidate others as well as flashed purple eyes when doing so.

Kamen Riders utilize Gaia Memories that have been refined such that they can only be used in specialized Memory Driver belts, and the Gaia Memories used do not enter the body and channels power through the Driver. These kinds of Gaia Memories were created by Shroud during her time as Fumine Sonozaki. This refinement makes them resemble USB drives, rather than the ribcage design on Dopant Gaia Memories, but further weakens the power of the Memories, only allowing access to the Memory's full power during a Maximum Drive.

To defeat a Dopant, a Kamen Rider has to use one of its Maximum Drive finishing attacks to eject and destroy the Gaia Memory, resulting in what is called a Memory Break (メモリブレイク). Evolved Gaia Memories require a direct strike on its location within the Dopant's body to execute the Memory Break. If the Dopant does not have a Living Connector, a Memory Break will not occur, however the Gaia Memory will still be ejected from the user's body. Dopants who use Memory Drivers are not susceptible to Memory Breaks.

List of Gaia Memories
{{#tag:tabber| Refined= {{#tag:tabber| Double= {{#tag:tabber| Right= These Gaia Memories used by Philip (Double's right half).
 * {{nihongo|{{w|Cyclone}} Memory|サイクロンメモリ|Saikuron Memori}}: Also known as the {{nihongo|Windy Memory|風の記憶|Kaze no Kioku}}, allows the user to move at fast speeds and control the very power of wind, turning them into the {{nihongo|Windy Warrior|風の戦士|Kaze no Senshi}}. When used, half of Kamen Rider Double becomes the green {{nihongo|Cyclonic Right Half|旋風の右半身|Senpū no Migi Hanshin}}. Forms using the Cyclone Memory possess the {{nihongo|Windy Stabilizer|ウィンディスタビライザー|Windi Sutabiraizā}}, a silver scarf hanging from the neck.
 * {{nihongo|{{w|Heat}} Memory|ヒートメモリ|Hīto Memori}}: Also known as the {{nihongo|Hot Memory|熱き記憶|Atsuki Kioku}}, empowers the user with the element of fire, turning them into the {{nihongo|Blazing Warrior|炎の戦士|Honō no Senshi}}. When used, half of Kamen Rider Double becomes the red {{nihongo|Heated Right Half|熱き右半身|Atsuki Migi Hanshin}}.
 * {{nihongo|{{w|Moon|Luna}} Memory|ルナメモリ|Runa Memori}}: Also known as the {{nihongo|Illusion Memory|幻想の記憶|Gensō no Kioku}}, allows the user to cast illusions, stretch limbs, and bend gunshots, turning them into the {{nihongo|Mysterious Warrior|神秘の戦士|Shinpi no Senshi}}. When used, half of Kamen Rider Double becomes the gold {{nihongo|Fantastical Right Half|幻想の右半身|Gensō no Migi Hanshin}}.

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Unused Gaia Memories
Several times throughout the television series, briefcases filled with various Memories are briefly shown, with a great many of them never being used or even being identifiable. Foundation X facilities also sometimes have various Memories on display.
 * Key
 * Injury
 * Dog
 * Time
 * Lightning
 * Pyramid
 * Umbrella
 * Apple
 * Zero
 * Bean
 * and others

Toy-Exclusive Gaia Memories
Special Edition= In real life, there exist exclusive illustration or toy Gaia Memories that do not exist in the television series, usually released in Kamen Rider related media, such as Televi-kun and Ganbaride.

A new batch of special Gaia Memories was released in 2013, more or less two years since Bandai stopped releasing Gaia Memories in any form — DX Candy Toy, Gashapon. One reason is the advent of Kamen Rider OOO's O Medals. Instead of Kamen Rider faces, the new releases feature logos of the riders' main form and/or final forms. Not only that, the new batch will include a full set of Showa Kamen Rider Memories, and Heisei Kamen Riders' Final Form (minus Wizard and future Riders) Memories.

There was a Gaia Memory Complete Selection that had Gaia Memories that weren't used in TV Shows or some of the movies.

Legend Rider=
 * Kamen Rider 1 (2013)
 * Kamen Rider 2 (2013)
 * Kamen Rider V3 (2013)
 * Riderman (2013)
 * Kamen Rider X (2013)
 * Kamen Rider Amazon (2013)
 * Kamen Rider Stronger (2013)
 * Skyrider (2013)
 * Kamen Rider ZX (2013)
 * Kamen Rider Black (2013)
 * Kamen Rider Black RX (2013)
 * Kamen Rider Shin (2013)
 * Kamen Rider ZO (2013)
 * Kamen Rider J (2013)
 * Kamen Rider Kuuga
 * Kuuga Ultimate (2013)
 * Kamen Rider Agito
 * Agito Shining (2013)
 * Kamen Rider Ryuki
 * Ryuki Survive (2013)
 * Kamen Rider Faiz
 * Faiz Blaster (2013)
 * Kamen Rider Blade
 * Blade King (2013)
 * Kamen Rider Hibiki
 * Armed Hibiki (2013)
 * Kamen Rider Kabuto
 * Kabuto Hyper (2013)
 * Kamen Rider Den-O
 * Den-O Liner (2013)
 * Kamen Rider NEW Den-O
 * Kamen Rider Zeronos
 * Momotaros
 * Urataros
 * Kintaros
 * Ryutaros
 * Sieg
 * Deneb
 * Kamen Rider Kiva
 * Kiva Emperor (2013)
 * Kamen Rider Decade
 * Decade Complete (2013)
 * Kamen Rider Diend
 * Kamen Rider Double
 * Ganbaride
 * Televikun (Note: This toy gives off the call of the Joker and Cyclone Memories, Double's catchphrase, and the "Televikun Maximum Drive")
 * Kamen Rider OOO
 * OOO Putotyra Combo (2013)
 * Kamen Rider Fourze (2013)
 * Fourze Cosmic States (2013)
 * Kamen Rider Wizard (2013)

Wizard
The Gaia Memories, along with the other Rider Powers, were stolen from Double by Amadum in the world within the Magic Stone, who explained that they were already his due to the Riders' powers being from the same source as evil. However, the power was soon returned thanks to the appearance of Kamen Rider Gaim, with the return of the Memories immediately transforming Double into CycloneJokerXtreme.

Portrayal
The voice of the Gaia Memories is provided by Fumihiko Tachiki (立木 文彦), who is also the narrator of W.