Info abt the Decade Rider System & Its User...

Tsukasa Kadoya :

Tsukasa Kadoya ( 門矢 士, portrayed by Masahiro Inoue) is a hypocritical and self-righteous young man who does not know much about his past and has the ability to transform into Kamen Rider Decade. As a photographer, he uses the Hikari family's print shop to develop his photos, but his photographs never develop well. He learns that this is because of his world being supplanted by the worlds of the other nine Kamen Riders.

Kamen Rider Decade Info :

-Rider height: 192cm

-Rider weight: 83kg

-Punching power: 4t

-Normal kicking power: 8t

-Maximum jump height: 25m

-Maximum running speed: 100m/6s

Equipment :

Decadriver

Tsukasa transforms into the striped shield bug-like Kamen Rider Decade through the use of the 'Decadriver (ディケイドライバー, Dikeidoraibā)' belt. Through the use of various Rider Cards, Decade can transform into any of the main Heisei Kamen Riders using the command "Kamen Ride". Using the command "Attack Ride", Decade can use the other Riders' powers.

(IMPORTANT NOTE): It is not known if Decade, like several Kamen Riders before him, has alternate forms. It is only known that Decade has the ability to transform into previous Riders through the use of the Rider Cards.

Ride Booker

Decade's primary weapon is the 'Ride Booker (ライドブッカー)' which has three modes: Book Mode (ブックモード), Gun Mode (ガンモード) and Sword Mode (ソードモード). While in Book Mode, the Ride Booker holds the Rider Cards that Decade uses in his transformations and attacks, such as the Attack Ride Card (アタックライドカード). In Sword Mode, the Ride Booker's finishing move is the Decade Slash (ディケイドスラッシュ). In Gun Mode, the Ride Booker's finishing move is the Decade Blast (ディケイドブラスト).

Machine Decader

-Length: 2320mm

-Width: 835mm

-Height: 1155mm

-Top speed: 350km/h

Info on the rumored Second Rider from Decade:

Little news about Kamen Rider DCD’s 2nd Rider... he would be called Kamen Rider CRISIS and his Belt is called the "CrisisDriver". For the greatest pleasure of the secondary characters’ fans, our CRISIS can transform into Kamen Rider G3, KNIGHT, KAIXA, GARREN, IBUKI, GATACK, ZERONOS and IXA. :)

I really wonder how the suit actor sees things wearing this kind of mask...lol...