From "Kamen Rider Double".

Magma Dopant ( マグマドーパント ):
http://i231.photobucket.com/albums/.....agmaDopant.jpg

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Identity: Yousuke Togawa ( 戸川 陽介 )
Gaia Memory: Magma Memory ( マグマメモリ )
Episodes: 1
Destroyed by: Kamen Rider Double CycloneJoker's Joker Extreme

Having mysteriously disappeared, Yousuke Togawa reappears having the Magma Memory and the ability to transform into the Magma Dopant, targeting Windscale stores. After being defeated by Double, the Magma Memory is destroyed and Yousuke is attacked by the T-Rex Dopant.

©Toei