I voted Kiva. Honestly, while people mock/complain the overuse of Emperor form, it really shows just for strong the Fangire were. I mean, Rook showed up like 15 episodes in and trashed everyone. And I know people also like to go after Wataru's Hikkomori nature, but I also seem to recall his bent as "Fuck off or I kill you dead King". What happened if THAT Wataru stepped into this "battle", hm? Or how about the Wataru that was trying to get Tsukasa to destroy the AU Rider worlds?

Sorry if my opinion seems a bit standoffish. While I realize Kiva as a series has its flaws, I'll stand up for since it was my first Kamen Rider experience.

Isn't the point of that bat thing on his Zanvat saber to repress that attitude?
Implying that, technically, it's removal could allow his ruthless nature to return once more?

It doesn't repress that attitude as he started acting like that even while the limiter was still on Zanbat. That attitude stems from his experiences in the past fighting alongside his father and a wish to be stronger. That attitude is all Wataru. The limiter merely keeps the power of the sword (and it's influence) from corrupting him. But honestly by the end of the series his resolve and strength had grown such that I believe he could easily withstand Zanbats' true power.

Yeah, you basically summed up what I would have said. And yes, if we are talking end of series Wataru(which is what I use to judge all these battles by in my head, them once the series is complete), he ain't got no time for a tub soak :lol.

Edit: I have to admit I'm loving the fact this battle is a three way tie right now.

I'm starting to think this might happen. And it's not just a tie, but a 3 way tie.

HA-HA 3 way...

Kuuga has more finesse with his forms...Kiva...well as Decade would say, "use a beast to fight a beast."

W is just under powered. He actually is one of the weakest Riders I have seen, but damn he has style...

Kiva is raw power yes...but just not enough. The fight would get dirty and there would be a TON of collateral damage, but in the end Kuuga would stand.

Well Kuuga is winning by one for the moment.

To further elaborate on Kiva. People often say that he has to rely on his final form, Emperor, too much. However that's not really a statement on his weakness but more of a statement on just how powerful his enemies are. By the end of the series, once Wataru has returned from the past, his damn eyes frighten Fangires. The monsters that require a final form to fight every time are scared of his stare in human form! That's a true testament to Kivas' power.

RAINBOWS. OF. DEATH. Who needs anything else? (Though yes, you are correct).

I suppose W and Kuuga would just have to wait for a few hours if Kiva tried to kick anyone then. But if I'm not mistaken and forgetful, doesn't the Luna memory draw its power from nighttime?

I voted for Black Rx, not surprised to see Agito win though.