Like I said, the only Buckle that triggers a Dual On announcement is Boost. There?s literally no other Buckle that does that.
Furthermore, there is only one non-Armed, non-Boost variant announcement in the Driver anyway, and that?s Fantasy?which also doesn?t trigger an announcement with anything other than Boost.
As per the show, it doesn?t look like you can pair two larger Raise Buckles with each other, either, as it?s never been done despite repeated opportunities, so it?s not even like you can say that Ninja and Zombie could be a pair with each other, either.

If that were the case, I doubt they would have packaged Ninja and Zombie together in the Revolve Change Series.

If Geats was adapted, what'll be a good "henshin call"?

Maybe "Buckle In"?

Maybe?

Though since the DGP is like a game. ?Game On!? Would sound cheesy.

If ?Kamen Ride!? Is still open or something else?

?Jack in!? With the buckle. Then? ?Geats or whatever dubbed name? ?Power Up!?

Common Rider

They didn?t really have a choice considering the way they?re doing the RC figures.

Unless you can explain why no Rider has ever used more than one non-Boost large Raise Buckle at any point, despite having multiple opportunities to do so.

Fever Slot

Continue what was started in Dragon Knight:

"Let's Ride!"

Now that I think about it, "Buckle In" works better than I thought, as it both refers to how they're going to transform, and can be used to preface a statement regarding the fight they're going to be in.