|This article is about a/an rider in Kamen Rider Decade.|
Tanaka (田中 Tanaka) was a Dark Rider that appears in Kamen Rider Decade.
An A.R. version of Alternative is an evil Rider associated with the Dark Riders who assumed the guise of the Negatives World counterpart of the real Tanaka, Natsumi Hikari's high school teacher. Though ordered by Otoya Kurenai (A.R. World) to keep an eye on Natsumi rather than kill her, he intentionally decides to attack Natsumi, resulting in Dark Kiva beating him merciless. Alternative is then later destroyed by Kamen Rider Diend.
- Punching Power: 15 t (300 AP)
- Kicking Power: 22.5 t (450 AP)
- Maximum Jump Height: 50 m
- Maximum Running Speed: 100 m per 4.5 seconds
- Sight: 20 km
- Hearing: 15 km
Tanaka transforms into Alternative Zero using his Advent Deck and V-Buckle. Alternative Zero is the prototype model of Alternative, a mimicry of the 13 Riders. Although it is unclear if the two are contracted in the same way as the 13 Riders and their Contract Monsters, the Mirror Monster Psycorogue can be summoned by Alternative Zero and follows his commands. Alternative Zero's Visor, the Slash Visor, is a gauntlet mounted on his right arm.
Through the use of his Sword Vent, Alternative Zero can arm himself with the Slash Dagger (スラッシュダッガー Surasshu Daggā), a sword derived from Psycorogue's forearms. By using the Wheel Vent, Alternative Zero can transform Psycorogue into motorcycle mode named the Psycoroader (サイコローダー Saikorōdā) for him to ride.
By using his Final Vent, Alternative Zero can execute his finisher, the Dead End (デッドエンド Deddo Endo), which transforms Psycorogue into the Psycoroader if it has not done so already. Alternative Zero then rides the Psycoroader toward the opponent and rams into it.
- Main article: Psycorogue
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