[Switchblade]

Okay, I'll bite. I've got some time to kill.

Kamen Rider: 2 (Rider 1, Rider 2 - Shocker Riders don't count)
V3: 2 (V3, Riderman)
X: 1 (X)
Amazon: 1 (Amazon)
Stronger: 2 (Stronger, Tackle - yes, I count her)
Skyrider: 1 (Skyrider)
Super-1: 1 (Super-1)
ZX: 1 (ZX)
Black: 1 (Black)
Black RX: 1 (Black RX - Biorider and Roborider are the same guy, not separate characters)
Shin: 1 (Shin)
ZO: 1 (ZO)
J: 1 (J)
Kuuga: 1 (Kuuga)
Agito: 6 (Agito, G3/G3-X, Gills, G4, Another Agito, G3 Mild)
Ryuki: 15 (Ryuki, Knight, Scissors, Zolda, Ouja, Raia, Gai, Imperor, Tiger, Odin, Femme, Verde, Ryuga, Alternative, Alternative Zero)
Faiz: 5+x (Faiz, Kaixa, Delta, Psyga, Orga many Riotroopers)
Blade: 7 (Blade, Garren, Chalice, Leangle, Lance, L'Arc, Glaive)
Hibiki: 15-ish (Hibiki, Todoroki, Ibuki, Zanki, Daiki, Sabaki, Shuki (ugh), Kabuki, Nishiiki, Touki, Habadaki, Kiramiki, armed Kiriya, armed Akira, Eiki... I think there are one or two others, but that's all I can remember by name)
Kabuto: 11 (Kabuto, Gatack, Drake, TheBee, Sasword, Dark Kabuto, Punch Hopper, Kick Hopper, Caucasus, Ketaros, Hercus)
Den-O: 6 (Den-O, Zeronos, New Den-O, Gaoh, Yuki, Nega Den-O - Goldra and Silvra don't count)
Kiva: 6 (Kiva, Ixa, Saga, Dark Kiva, Arc, Rey)
Decade: depends entirely on how you count. I say 5 (Decade, Diend, Onodera Kuuga, Kivara, Abyss)
W: 4 (W, Accel, Skull, Eternal)
OOO: 5 (OOO, Birth, Birth Prototype, Poseidon, Aqua - not counting Core because it was stupid)
Fourze: 2 (Fourze and Meteor)
Wizard: 3 so far (Wizard, White Wizard, Beast)