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Icon-w.png This article is about a/an Gaia Memory in Kamen Rider W.

"Trial! (Countdown sound, followed by an engine speeding)"
―Transformation announcement[src]

"Trial Maximum Drive!"
―Finisher announcement[src]

The Maximum Counter Trial Memory (マキシマムカウンター トライアルメモリ Makishimamu Kauntā Toraiaru Memori), also known as the Challenge Memory (挑戦の記憶 Chōsen no Kioku), is a special Gaia Memory that allows Kamen Rider Accel to become Kamen Rider AccelTrial.

While in Memory Mode (メモリモード Memori Mōdo), the Trial Memory enables Kamen Rider Accel to transform; the transformation is complete once the light on the traffic light-like Trans-Signal (トランスシグナル Toransu Shigunaru) goes from red to blue (with a 3-second countdown sound effect). While in its stop watch-like Maximum Mode (マキシマムモード Makishimamu Mōdo), once the Maximum Switch (マキシマムスイッチ Makishimamu Suitchi) timer button is pressed, Kamen Rider AccelTrial has ten seconds to perform as many attacks as possible, usually kicks and, on one occasion, slashes, before pressing the Maximum Switch again to activate the Maximum Drive.

If the Maximum Switch is not pressed within the time allotted, the Maximum Drive fails and Kamen Rider Accel's transformation is forcibly and painfully canceled. To handle this, Kamen Rider Accel normally tosses the Trial Memory into the air as the Maximum Drive begins, pressing the Maximum Switch as soon as it is caught and declaring the time indicated when the timer is stopped.[1][2]


Once the Maximum Drive is initiated, Kamen Rider Accel Trial can only be used for another 10 seconds before being forcibly reverted to human form, but the transformation is retained if the Trial Maximum Drive is successfully executed within 10 seconds. This form's Maximum Drive is the Machine Gun Spike (マシンガンスパイク Mashingan Supaiku), a series of multiple kicks in a row which leaves a series of energy tread marks in the form of a T. The power of this Maximum Drive is only limited by how many kicks AccelTrial can perform within the 10 second time limit.

  • When Kamen Rider AccelTrial combines the Engine Maximum Drive with the Trial Maximum Drive, he can perform the Machine Gun Slasher (マシンガンスラッシャー Mashingan Surasshā) Maximum Drive, repeatedly slashing the target in the time limit, instantly destroying them.




  1. Cite error: Invalid <ref> tag; no text was provided for refs named toei33
  2. "TV Asahi's page for the Trial Memory". http://www.tv-asahi.co.jp/double/rider/trialmemory.html. Retrieved 2010-05-22. 
Icon-w.png Kamen Rider W
Narumi Detective Agency
Shotaro Hidari - Philip - Akiko Narumi - Sokichi Narumi† - Tokime
Memory Drivers
Double Driver - Accel Driver - Lost Driver
Gaia Memory-related
Gaia Memories - Memory Gadgets - Fang Memory - Xtreme Memory - Trial Memory - Gaia Memory Enhancing Adapter
Metal Shaft - Trigger Magnum - Engine Blade - Skull Magnum - Prism Bicker - Eternal Edge - Shroud Magnum
RevolGarry - HardBoilder - Gunner A - Diablossa - SkullBoilder - SkullGarry - HardMammother
The Fuuto Irregulars
Santa-chan - Watcherman- Queen & Elizabeth - Isamu Bito
Futo Police Department
Ryu Terui - Mikio Jinno - Shun Makura
Museum and the Dopants
Foundation X
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Dopants: Magma Dopant - T-Rex Dopant - Money Dopant - Anomalocaris Dopant - Cockroach Dopant - Sweets Dopant - Virus Dopant - Violence Dopant - Arms Dopant - Bird Dopant - Ice Age Dopant - Triceratops Dopant - Liar Dopant - Puppeteer Dopant - Invisible Dopant - Nightmare Dopant - Beast Dopant - Zone Dopant - Yesterday Dopant - Quetzalcoatlus Dopant - Gene Dopant - Jewel Dopant - Old Dopant - Utopia Dopant - Energy Dopant
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Katsumi Daido - Maria S. Cranberry - Reika Hanehara - Kyosui Izumi - Gozo Domoto - Ken Ashihara