Fang Memory also known as the Fanged Memory is a special Gaia Memory that was solely created to protect Philip and act on his orders, enabling him and Shotaro to transform into FangJoker. It can change between its Live Mode, which resembles a Dromaeosaurid, and its Memory Mode, the top of which resembles a dinosaur's head. When used, half of Kamen Rider Double becomes the white Fanged Right Half, enabling Kamen Rider Double to fight like a berserker while altering the left half to match it in being animalistic in design.
FangJoker is a white and black form that Double uses to escape from Philip's captors during the events of the Begins Night as seen in Kamen Rider × Kamen Rider W & Decade: Movie War 2010.
As the Fang Memory was designed for Philip, his and Shotaro's roles as Double are reversed in FangJoker, with Shotaro's consciousness transferred into Philip's body for the transformation, Double's left eye flashes whenever Shotaro speaks. This form is described as the Wild Skilled Warrior, as the transformation takes an extreme tax on Philip's body as he tends to lose control of himself when in this form during its first two uses. Additionally this form cannot be used for long periods of time due to Philip's weaker body. FangJoker is considered to be faster and stronger than the other forms that came before it.
Publication Information
- Mode : FangJoker
- Japanese : 仮面ライダーサイクロン
- Users : Philip (Fang), Shotaro Hidari (Joker)
- Gender : Male
- Transformation Announcement : Fang, Joker! (Heavy metal guitar riffs to orchestral hit)
- Rider Height : 195cm
- Rider Weight : 82kg
- Punching Power : 8t
- Kicking Power : 13t
- Maximum Jump Height : 30m
- Maximum Running Speed : 100m/3.2s
- Fang Streiser : 45t
- Appearances : Begins Night, Episodes 16-17, 20, 22, 28, 31, 38, 43-44, The Gaia Memories of Fate, Movie War Ultimatum
- Season : Kamen Rider W
- First Appeareance : Kamen Rider W Episod 16 : The F Afterglow/Recover Your Partner
- Potrayer : Masaki Suda (Philip/Fang), Renn Kiriyama (Shotaro Hidari/Joker)
- Main View : Full Episod
By activating the Fang Memory's horn between one and three times, FangJoker is able to summon a bladed weapon that forms on various portions of FangJoker's body. One time summons the Arm Saber on FangJoker's wrist to be used as a close combat weapon; two times summons the Shoulder Saber, which can be removed from FangJoker's right shoulder to be used as a dagger or boomerang-like weapon; three times summons the Maximum Saber on FangJoker's right ankle.
This last Saber is used to perform FangJoker's Maximum Drive: the flying roundhouse kick Fang Streiser, in which a projection of the Fang Memory's head is shown "biting" the opponent when Double comes in contact while forming a projection of the English Letter F. This can be used in combination with Kamen Rider Accel's Accel Glanzer to perform the Rider Twin Maximum.
Fang Memory Memory Mode

When Double presses the Fang Memory's horn between one and three times, he can manifest a bladed weapon on a different part of his body's right side.
- Once : The Arm Saber for Double's wrist to be used as a close combat weapon.
- Twice : The Shoulder Saber for Double's shoulder, which it can be detached from to be used as either a dagger or boomerang-like weapon.
- Thrice : The Maximum Saber for Double's ankle to execute the Fang Streiser.
- Main Article : Kamen Rider W Arsenal, Weapon & Abilities