I'm not disputing that OOO has the medals, I'm disputing the possibility that they'll fly out and protect him since they aren't inside of him anymore.

No, what I'm meaning is that they aren't physically inside him.
Why is this important?
Because he doesn't have that little defense anymore. They're still usable, but they're not going to fly out and block crap for him.

Given that the riders would actually want to fight, I would assume that they would fight honorably and give it their all, because that's what warriors do. They tend not to use dirty tricks. So I don't think transformation times and junk like that would factor in as heavily as some people are making it.

And then the whole trinket transformation thing. I've always operated under the assumption that the switching of trinkets was purely for dramatic effect and selling of the gimmick for merchandise purposes. So in reality, any required time would be negligible.
Besides, if enemies are always giving them time to switch, if these battles were actually produced and televised and stuff, what's to say riders would not give each other that same courtesy? It goes with the whole fighting with the best ability thing.

That being said, I really like Kabuto even though I have yet to see the show, but my vote goes to OOO. I could just imagine Eiji combo spamming a la the Gokaiger's Gokai Change-a-thon(and they seem to be able to change seamlessly despite needing keys and a bulky phone changer[goes with my negligible change time argument]) and using all sorts of various attacks against Tendou's martial arts.

When you're fighting someone who can go at insane speeds, it matters how fast you can activate your powers to counter it. DiEnd isn't that fast once transformed.

Like Tendou would ever do that. :lol

See, this is why I wish I had already watched Kabuto at this point. Tendou sounds like a fun character.

you haven't seen Faiz have you...them belts DO fall off!

Oh Faiz, this is what people remember you for. :lol

My comment on DiEnd was more refering to a comment I vaugely remember from the Episode Yellow battle, where someone said DiEnd would try to steal the Hyper Zector. And then there was the time he stopped Onodera from transforming by sticking his gun in his face.

This isn't about Riders dropping belts, it's about beating the crap out of each other :lol.

I've thought about this some more. And I still think OOO wins this, but an added challenge is a smart use of Clock Up. Eiji goes to switch coins, Tendou hits Clock Up, and steals one. Or switches one coin for another comepletely throwing him off.

And then Kabuto takes the scanner, making OOO unable to transform again. Kabuto would still win this.