AN: This is a one-shot for my Kamen Rider Build/ Code Geass crossover created by Jetslinger333.

Build- Rabbit-Tank Revolution Story IDEA 1

Princess Euphemia was in her bedroom ready to sleep for her big day tomorrow. She was very happy with her idea approved by her brother Schniezel. But she knew the price for such act but she doesn't regret about as long it can make everyone happy. Unknown to her someone in a red suit with a cobra theme was in her chambers.

The next day, a ceremony was started as those who are important waiting for others. Zero also is known as Kamen Rider Build arrive earlier with the stolen Gawain along with Kallen also known as Ryuga. They are waiting to the one that decided the SAZ and she was very late.

"She's taking a lot of time powdering her nose." Zero said to his companion.

"Agree," The redhead said.

While waiting, Suzaku Kururugi was looking at Zero with distaste how much he hated that such a man possess such power. There also the criminal Kallen Stadtfeld or Kallen Kozuki whom was accused of killing and destroying the Stadtfeld mansion. He and his fiber wanted to arrest both of them but in honor of princess Euphemia, he resists the temptation.

Cornelia was also here sure she didn't want to come but a certain blond prince told her that she needed to come to make sure everything must be fine. Like Kururugi, she shows distaste towards Zero.

While everyone was waiting an explosion was heard it wasn't far no more likely near to the Viceroy's palace. Then Cornelia's phone was on with loudspeaker.

"What's going on?!" she questioned.

"Your Highness some kind of monsters just enter the palace and killed princess Euphemia!" Said the maid from the other side.


Cornelia whom heard this can only shock in stupor holding the line. Suzaku also heard along with Cornelia's knights. All of them felt sadness and rage that such creature not only harm royalty but even killed her.

Meanwhile the self-proclaimed best! Genius in the world Lamperouge was already started communicating with N whom is his sister about the situation and it was way too suspicious.

"Anyway, keep a close eye on it…" Zero whispered quietly.

The giant screen soon showing the Smash creature that was a size like a knightmare heading straight towards the Zone and it looks like a castle. Of course the Japanese seeing this ran including others.

Except the Cornelia royal guard, the Kyoto representative and Build's allies. Whom just stay looking at the creature from the giant screen?

"Zero! You set us up, didn't you!?" Suzaku growls, pointed his accusing finger at the masked revolutionary.

Zero glared back at Suzaku. "If the creature was my doing, then why would I come here in the first place?" He retorted at Suzaku's accusation.

"…" Suzaku didn't like the answer.

It was then Cornelia awoken from her shocked and fill her mind with rage.

"I want that creature suffered before I struck it down personally!" Cornelia growls angry. "Zero, if you moved the spot then you will be charge for creating that monster and abolish the Zone!"

Zero scoffed as he and Kallen watching Suzaku and Cornelia's force moving away.


With Cornelia gathering her entire forces she launched a full-scale attack on the Smash. Zero can only look at the screen while at the same time communicating with his sister.

Nunnally as N acted as Lelouch information hacker using all secure camera to provide information and tactical advantage. As right now she's providing image and info of the Smash.

Cornelia and her forces along with the Lancelot decimate the smash with no mercy. The Smash was shoot with assault rifle, stab with a lancer and slash with the MSV sword.

The Castle Smash can only make a screeching sound and kept defending itself from the attack. The Smash keeping going straight towards Cornelia like a wild bull.

"N, I want you to record the voice that the Smash is making," Zero said.

"Got it." His sister says before recording the voice of the Castle Smash.

"Then isolate at the right frequencies." Zero instructed.

Zero heard what the creature saying didn't utter any words. The same goes for his sister as both Lamperouge siblings realized who the Castle Smash really was.

"We have to stop them if not they make the greatest mistake of their lives. Kallen I need you to stop Guilford and the rest while I take on Cornelia and Suzaku." Zero said.

"Got it, it's a perfect time to use Cross-Z Magma." Kallen answered with an affirmative tone.


Guilford, Darlton and his sons were stopped by Guren whom the pilot just got out Kallen took the Cross-Z Magma Knuckle. She then inserting the bottle into it.

BOTTLE BURN!

CROSS-Z MAGMA! ARE YOU READY?

"Henshin!" Kallen shouted before twisting the lever of the Build Driver. Suddenly metal gothic choral rock music began playing in the background.

GOKUNETSU KINNIKU! CROSS-Z MAGMA! ACHACHACHACHACHACHACHA ACHA!
After cranking the Vortex Lever, the Magma Ride Builder forms and submerges the user in Variable Magma. The others thought she commit suicide but change when a forming 8 large serpentine dragon heads which harden to solid rock as they rise. The Magma Ride Builder then breaks the hardened construct, revealing Cross-Z Magma.

"My soul is burning like magma!" Cross-Z Magma cried out before charging forward.

The Knightmares tried to shots at Cross-Z but the Rider continued charging and throw a powerful punch on Knightmare of Guilford's knee before slammed it the second time. The Knightmare suddenly exploded when hot magma burning course through it as Guilford was forced to eject.

Daltron tried to impale the Rider with his knightmare weapon. But Cross-Z knocked it with a powerful kick before she sidesteps to avoid the bullets. She then jumps up into the air and slammed her fist straight into Daltron's Knightmare, knocked it straight to the ground. The second knight of Cornelia can see hot magma starting to leaking into the cockpit before Cross-Z slammed her fist straight into it and causing the entire Knightmare to explode.

Cross-Z then looks back at the other Knightmares and they cannot help being shocked by the destruction created by Cross-Z's new power.

Soon the Knightmares charged at her in order to avenge their father.

"I won't lose to anyone else…!" Cross-Z declared as she charging at the Knightmares with fiery fists.


While at the same time, Lelouch as Kamen Rider Build fought both Lancelot and Cornelia Gloucester using the Arbalest that can use a full bottle.

The Arbalest is a new mech design by him with a help of a few people. As the self-proclaimed best genius he wanted to create a new mech, not a knightmare but a new way better than a copycat like the Japanese Burai. He calls it ARM SLAVE short for Armored Mobile Master-Slave System. And he replaced the land spinner with gliding foils installed in the feet that allow it to roll on the ground fast on any terrain.

It was just to not only create a new mech that would outwit Knightmare frames but putting salt on the Earl Pudding's pride Lancelot as Build defeated it twice in a row.

The Arbalest has the ability to use the full bottle but the problem was it can only use one bottle and not two like the build system. Since a human can use nebula gas as a catalyst to transform but for a machine doesn't require the use of the gas.

Even if using one bottle he was able both defeating Cornelia and Suzaku in battle. Build got out of his mecha as he shakes two bottles.

PANDA!

ROCKET!

BEST MATCH!

ARE YOU READY?

Build cranking the lever of his Driver.

"Build Up!"

BUTTOBI MONOTONE! ROCKPANDA! YEAHHH!

Soon Build donned in his RockPanda Form and looks at the Castle Smash.

"Please endured the pain…" Build cranking the lever for a quick finish.

READY GO!

VORTEX FINISH YEAH!

Build surrounds the enemy with a white, oval-shaped energy chart, then used the Space Ride Arm to fly at the Smash and performs a series of slashes with the Giant Scratcher. The chart goes up as Build continues to slash the enemy using both gravity and speed increasing it's attack.
It soon exploded on the ground, revealing the body of a broken princess… Princess Euphemia was the Smash.

Cornelia and the others were shocked of the revelation. It was then she realize that she almost killed her own sister. "NOOO!"

"No…" Suzaku was even shocked it was some kind of mockery of his sins.

Then a clap sound can be heard it was a slow clap everyone then look at the source it was the maid that attendant princess Euphemia then reveal a person wearing a red suit theme of a Cobra.

"Blood Stark, this is your doing…" Build stated.

"Of course it was me whom kidnapped the princess I thought it be fun if I turned the princess into a smash and watched on how both her family and knight try to killed her without knowing the d it was so amusing like drinking the finest wine." Blood Stark said before taking what looks like a purple bottle that fall from Euphemia.

"You… you dare hurt the member of the royal family!" Cornelia was furious pulling her gunblade.

"Oh, why not? I'm just following your father ideology the strong devour the weak. Since she is now weak and no longer royalty." Blood Stark stated.

"What do you mean?" Cornelia questioned.

"Ooh, she didn't tell you, did she?" As Blood Stark walk towards the battered and bruise Euphemia, "You see… your highness. In order to gain something, something of great value must be given in return. And what can royalty like her to give for creating the Zone as a trade."

Cornelia then realize what he meant. "No… Euphemia gives up her—"

"Her royal title!" Blood Stark finished as he kicked Euphemia and stepping on her, "She's no longer royalty and just a nobody which is why I can do anything at her!" as Bloody Stark step on the former princess arm as she scream in pain.

"Stop!" Cornelia pleaded desperate to the cobra-like villain.

"As your father decree those whom no longer royalty are dead to the world as such she's a nobody. It was fun and funny seeing how you fought savagely trying to killed her… YOUR OWN FAMILY MEMBER!" As Blood Stark played the voice that he recorded and translate for all to heard. It was Euphemia voice begging for help from her sister and her knight Suzaku. The voice of pain and suffering can be heard.

Suzaku wanted to puke hearing that he commit such atrocities towards the person that love him and Cornelia was the same.

"Why are you doing this?" Cornelia demand, gritting her teeths.

"Because it's fun watching the face of despair on your face." Blood Stalk said. "After all she no longer royalty I can do whatever I want to her with no consequences and you can't do a thing. That same goes for your knights."

Build soon step forward and pointing his weapon at Blood Stark. "But I can,"

"Still how did you know-"

"It was her movements that pique my interest. Why she continue moving towards the zone but avoiding civilian casualties and defending against Cornelia's Gloucester. The Smash didn't attack only continue defending each other. That is why I try to understand her voice." Build explains.

"Hehehe… as expected of the leader of Black Knights, you never let something like that went passed you. Unlike her so-called white knight and savage sister." Blood Stark muse devious. "Shall we?"

Blood Stark and Build stare hard at each other before they charged forward at each other.


It wasn't long until Build and his allies left after Blood Stark made a disappearing act again. Euphemia was in the hospital her arm was covered in a bandage. Euphemia was traumatized and for the first time as she felt weak and hopeless. It was a different feeling. The feeling on how you drowned in the ocean and nobody would notice you and help you.

She felt weak, pain, betray, despair… and anger.

Cornelia try to comfort her sister but her presence just make it worst. Euphemia can only look at her sister, but only face an image of the Gloucester and frighten of her presence. Even she doesn't want to be touch by Cornelia.

Suzaku was also the same but he knew when to give space. Euphemia didn't look at him at all. Only remembered how Suzaku piloting the Lancelot decimating her when she's a Smash. She then accused him of being like a savage not the knight she knew and loved. How he didn't understand her at all and decided that she doesn't want to see and Suzaku no longer her knight.

Her words was devastated blow to Suzaku. It was like how killed his father and he was about to do the same thing again.

Then one day Euphemia went missing she left a note for her sister Cornelia telling her that she just couldn't stand seeing her sister face. And needed to be alone.

The former princess is crawling on the street of Tokyo settlement. The sky is pouring with rain on the miserable former princess. It wasn't until she stop and saw a face of her half-brother Lelouch waiting for her with an umbrella.

The two half siblings stare at each other before Euphemia spoke up.

"Lelouch…" she croaked with tears from her eyes.

"Let's get you out of the rain…" Lelouch said as he offered her a hand.


AN: That is the end of the one-shot for Build/Code Geass. The arm slave is from Fullmetal panic and glide from Armored Trooper Votoms. Anyway, be sure to review or message me for any questions, comments, or concern. And don't be afraid to look at my other stories.