A war's erupted between Touto, Hokuto and Seito
over the immense energy within Pandora's Box.
Kiryu Sento, also known as Touto's Kamen Rider Build,
clashes with Hokuto's Kamen Rider Rogue, but...
Oh crap, it's overflowing!
Oh no, the Pandora's Box!
And... he got away.
Wait, why am I going after Misora?
Just what's gonna happen on Episode 26?!
Misora?!
What was that...?
Why did the transformation stop so suddenly...?
Misora! I'm so sorry!
Are you okay, Misora?!
I'm fine.
Do you have any idea what you've done?!
Calm down!
Never mind that, somebody must've told Seito about this place.
We're supposed to be the only ones who knew the Box would be here.
But, well...
There's a traitor among us.
It's been ten years since the Martian Pandora's Box caused the Sky Wall Tragedy.
Our country was split in three: Touto, Seito, and Hokuto,
and chaos has ensued.
I'm going to keep walking on tonight
Moving on straight ahead
Leaving only a single set of footprints ahead of me
It seems so vast, but I get the feeling you're out there
Waiting for me somewhere
With a smile that never fades
There you will...
Be the one, be the one
All right!
Who'll never give up on the Earth's future
Be the lights, be the lights
All right!
You can be stronger
Love will never lose!
Helping, saving, and embracing
Touching our hearts so that it can reach out
Be the one, be the lights
Send this message and let it ring out!
At last, Pandora's Box belongs to Seito!
Treacherous Deathmatch
Oh, I can't wait...
I can't wait to witness the energy stored inside...!
And once I acquire Touto's bottles...
Then that dream will finally come true!
We have no intention to surrender our bottles.
With our military prowess, we could turn Touto into a sea of flames in no time.
I'm sure you do not want that,
so I suggest you consider my proposal.
Hey... Hey!
You really think there's a spy from Seito among us?
Shut up, it's none of your business.
Why are you venting on Miitan, you idiot?
Don't call me idiot! At least call me muscle-brain, or something.
Well, you have neither.
The shirt just hides how ripped I am!
Do you even eat?
Hey.
What are you zoning out for?
You're also one of our suspects!
Seito has proposed a proxy battle between Kamen Riders.
If we lose, we must surrender our territory on top of our bottles.
But if we win...
Not only they would withdraw from Touto, they would also vacate Hokuto.
Is that true?
However...
This time, the proxy battle will consist of three matches.
So that means they would face Sento, me, and...
I'm in.
Please, you must win this fight... and end this war!
I beg of you!
Hey, you sure we don't need to look for that spy?
Yeah, I will take care of that.
Right now, we need to develop a new upgrade.
During Overflow, the Hazard Trigger will spark an exponential rise of the user's Hazard Level.
But as a side effect, the user loses consciousness and goes berserk.
So, we need to create a device that would maintain rationality, even on Overflow.
How are you gonna make something like that?
Misora?!
Back then, I was somehow able to regain control.
In other words, your bangle has the power to stop that state.
I will now play footage of Build.
"Please, Mr. Bangle!"
"Make a bottle that exploits the Trigger's potential, so I can help the hottie brilliant physicist!"
Try wishing like that.
Why me?
Remember what you said?
"So if I can be of help... then I want... to fight too!"
Alright, get moving! We're counting on you!
I didn't say it like that!
Sheesh...
Okay.
Let's begin!
Here goes.
Look at that hottie!
Nevermind that, where did you get this footage anyways?
That's, uh...
Wow, that Rider Kick sure packs a punch, huh?
Don't just shrug me off...
So, Build transforms with Best Match bottles, right?
But what are Best Matches, exactly?
Is it an "animal plus machines are super strong combined!" kinda thing?
I prefer the terms 'organic' and 'inorganic', myself.
Best Match are basically when two essences work together nicely.
What do you mean by "nicely?"
Don't sweat the details!
Right now we have things like rabbit plus tank, gorilla plus diamond...
We still have no idea why these combinations work together.
So you don't really know either, huh?
No worries though, you have me and my brilliant sixth sense!
Leave it to me to find Best Matches in a flash!
At least say something!
Hey, it's Cross-Z!
I'm hella cool!
Okay, let's speed it up.
Hold on, why?!
But... my Cross-Z only uses a single Dragon bottle, right?
Then why is it so strong?
Because I am a brilliant physicist,
and with my dazzling intellect, I was able to make an item to amplify Dragon's essence twofold.
Then...
Does that mean it's possible to, say, combine two organic bottles?
Well. that's...
Whoa, Sparkling's just fizzing with energy!
Another dodge right there...
Stop dodging questions you can't...
Shut up!
I can't focus like this!
Play it slower!
So-sorry...
RabbitTank, the base form...
Sparkling, the form made with residual Pandora Box's energy, also uses the same motif...
Not only that...
Does that mean there's something special about RabbitTank...?
Yes.
It's finished!
Move!
Hey!
This is terrific!
It's a Rabbit bottle?
But the coloring is different. Why's that?
I dunno.
Tired.
Did exactly what you asked.
"Please, Mr. Bangle! I want to help the guy who thinks he's a hottie brilliant physicist,
so something something Hazard whatever" like that.
That's quite a way to word it.
RabbitRabbit...?
We've never tried pairing two identical essences.
RABBIT! RABBIT!
The light is on!
HAZARD ON!
CLINK! CLANK! BANG!
CLASH! CLANG! CLASH! CLANG!
ARE YOU READY?
A bust, huh?
No...
The two essences created a strong interference,
starting a condensation process where both essences combined as one!
If we can control the focused state...
You lost me already.
If we can create a device that can withstand RabbitRabbit's power...
This might be our answer.
Oh, Sawa.
What's wrong?
I want to help with the new upgrade.
Wait, where's the loud guy?
Kazumin said he'd go to Sky Road.
Sky Road?
You idiots...
You all left me behind.
Why are you digging a grave?
It's the least I could do for them.
That's...
Dog tags, with their names etched in.
One each, in place of their remains.
Nothing's left of them after their deaths...
It's not really fair.
You can't really believe they're gone at all...
Well then... let's begin the experiment.
Huh?
We get stronger the more we fight, right?
So while we wait for the proxy battle,
we'll just keep fighting each other, and raise our Hazard Levels!
Sounds like my kind of thing.
But you better not regret this later.
That's my line.
What's this?
It's a wiretap...
You're so good with your hands, Sawa.
This kind of work is my specialty.
Your father was a researcher too, right?
He was.
Actually, I looked into the gas explosion incident.
There was no one named Takigawa in the list of casualties.
That's, well...
Actually, Takigawa is my mother's family name.
I took her family name after my father passed away.
I see.
We need to win the proxy battle, no matter what.
To ensure a bright future for everyone...
We have to end this war.
One Week Later
PROXY BATTLE
Sawatari Kazumi
Washio Rai
Kamen Rider Grease
Engine Bros
Banjou Ryuuga
Washio Fuu
Kamen Rider Cross-Z
Remote Control Bros
Kiryuu Sento
Himuro Gentoku
TEAM SEITO
TEAM TOUTO
Kamen Rider Build
Kamen Rider Rogue
We will now begin the proxy battle between Touto and Seito!
We're counting on you.
With this, the bottles are as good as ours.
I will seize the energy within Pandora's Box,
and I shall become the leader of this country!
It's done...
A bottle that could make use of Hazard's maximum potential...
And a weapon to go with it!
Amazing, isn't it? Terrific, isn't it?
Am I a genius or what?
This is terrible...
We must hurry to the arena!
First battle! Kamen Rider Grease vs Engine Bros!
Fighters, get ready!
ROBOT JELLY!
GEAR ENGINE!
Transform.
Mistify.
CRUSHED! OOZING! OVERFLOWING!
ROBOT IN GREASE!
FUNKY!
ENGINE RUNNING GEAR!
Begin!
I'll burn my passion, and crush you!
Is Sento not done yet...?
I think he must be on his way now.
Defeat is not an option.
We...
We have lived our entire lives as weapons.
If we wish to survive...
Our only choice is to eliminate our opponents.
We'll gladly give our lives away for Chairman Nanba.
Because that is what we live for.
Anything for Nanba Industries!
We've been fighting by our own, all this time!
Can you even comprehend our resolve?!
RIFLE MODE!
GEAR ENGINE!
FUNKY SHOT!
GEAR ENGINE!
There's no way I could get that...
A guy like you, who will never know what it feels to have comrades...
I can't, and don't care what you think!
Shuuya...
Shokichi...
Masaru...
I am not like you...
A whole lot more rests on my shoulders!
Friendship!
Spirit!
Intensity!
Right now...
I get the feeling I can't lose!
He just stole my line.
I can't believe it, Grease took all that and he's still standing...
I kept wondering why those three could die with a smile,
but now, I think I understand.
Get ready for this!
SINGLE!
TWIN!
TWIN FINISH!
Eat this!
SCRAP FINISH!
Kamen Rider Grease wins!
Got it now, punk?
He did it!
Ow.
I've avenged you.
All right!
He actually did it.
Sento...
What about the upgrade?
Who do you think I am?
Sorry, but you won't get a chance to use that.
Whoa, back off...
That would be nice, honestly.
Let's do this!
Huh? Where's Sawa?
She said there's something she needed to do first.
Copy complete
Build has completed a new upgrade.
Copy complete
I will take the data to you now.
I see...
Good work.
Second battle! Kamen Rider Grease vs Hell Bros!
Hell Bros?
You sure you got the name right?
Whatever.
Right now... I get the feeling I...
GEAR ENGINE!
GEAR REMOTE CONTROL!
FUNKY MATCH!
Mistify.
FEVER!
PERFECT!
And... it just combined.
This is the beginning of your hell.
Hell Bros, at your service.
You're kidding, right?!
Kamen Rider Build!
N
E
X
T
If I win, this war will be over!
The match that will decide everything!
We've installed the countermeasure data.
The match that will decide everything!
This is the end!
The Rider System is not a weapon.
Sento, time for payback!
Then why did you build it?!
Sento, time for payback!
I will end this!
Sento, time for payback!
The Hero's Counterattack