A Collaboration [FGO x Buddyfight] Collab fan-story (Perhaps even other franchises)

[Big_BossO7]

In the Root, a very fundamental being for existence in the world called Nasu-verse. Void Shiki, a being who is the avatar for the ROOT, was simply drinking green tea. Why? It's simple, there ain't much work to do. Pruning out unrequired and dead end timelines while making sure timelines which shows progress and survivability stays intact at all costs. That was her job, and she opted many automatic functions for it, so she can view the worlds but after a certain extent....she got bored, there is only so much even the Root can do to satiate her desire to see something new.

However....Shiki got a 'visitor' from a world way beyond the Root....she didn't even know, there existed worlds which were far beyond the Root

A three-headed dragon, four arms with blade on her hand was infront of her. It was.....different, an energy far different from anything of their own world, which made it more assuring that there are indeed worlds far beyond the Root.

It's presence is that of a Deity...Shiki's world has gods and such too, but due to many conceptual lockage and conditions, they are nerfed compared to their strength way before they come to Earth and become part of it's Texture. This being...has no restraints like that.

"It's truly a wonder...why would a renowned deity like yourself from another world would desire to meet this world?"

Shiki asked, for she was curious...why would a deity from another world beyond hers would come to visit.

"Being of all knowing whose knowledge has become a burden....both of our world requires new horizons to reach and look forth...."

The armored deity dragon simply stated. Shiki chuckled....ah she can see, what exactly she means.

"Very well then, after few days, that can be arranged....an event where both of our worlds knowledge can be expanded to the horizons..."

Both of them agreed to a deal amidst their cryptic language

---

Author note:

Ain't the most nuanced guy around here. So yeah.....this is more so a ground and prep work which is to start it all off. In my Timezone, it is getting late, later on, i will upload the 1st chapter for this.

Grovels in traditional japanese way, for not even a 1k word start-off.

 

[Big_BossO7]

Going forward in time after the two entities had met and deciding to 'collaborate' to expand their horizons on respective worlds.

---

World of Buddyfight:
[3:30pm]

Amidst the skyscrapers and many building, The [Buddy Police Office] stands as an impressive, futuristic building which is a symbol for both authority of the organization and harmony between humans and Buddy Monsters who migrate from different worlds. Its sleek, high-rise structure is a blend of cutting-edge technology and modern architectural aesthetics which is a collaborated effort from this world and [Hero World]. The exterior is primarily composed of shimmering, reflective glass panels that give it a translucent, crystalline appearance, glinting under the sun during the day and glowing softly at night with energy-efficient lights.

The building's base is broad and fortified, symbolizing stability and strength, with reinforced metal accents and subtle engravings of Buddy Police insignias. Above the entrance, a massive, holographic Buddyfight card hovers, rotating slowly, symbolizing the organization's role in maintaining order in the world of Buddyfighting amidst the many criminals who try to misuse the powers of these otherworldly monsters.

The entrance features a wide staircase leading to a set of automatic sliding doors with embedded LED lights tracing the outlines of the Buddy Police emblem. Inside, the lobby is spacious and welcoming, adorned with holographic displays showcasing Buddyfight matches, current missions, and updates about Buddy Monsters.

Tall pillars with embedded screens rise throughout the lobby, each depicting iconic Buddy Police officers and their partners. The design integrates advanced security features seamlessly, with drones patrolling the perimeter and surveillance systems subtly concealed within the architecture. A massive, circular skylight sits atop the central atrium, flooding the interior with natural light.

The upper floors house high-tech command centers, training areas, and even spaces where Buddy Monsters from different worlds can comfortably interact with human officers. At the very top, an observation deck offers a panoramic view of the city.

It was supposed to be merely, another normal day while watching the city to prevent any crimes. It has only been a few days since the CEO of Chaos Control Company, Wisdom had been charged and detained for his crimes of the many crimes like converting the monsters of many worlds into legions of [CHAOS] who will obey him and aid the man with his twisted vision of "Upgrading" the world while the monster stay beneath the humans. Only to be prevented by the [Thunder Empire] and Mikado Gao, who put a stop to their plans.....After such a racket, he was detained, many of the forcibly converted monsters were turned back to normal, going to their own individual world while those whose effect cannot be reversed are slowly rehabilitated into society as normal beings rather than tools of obedience.

But....it seems that they just cannot get a break, as they got a [Red Alert - S] variation, which is really the worst thing to be notified, just few days after the incident with Wisdom.

"...Are you sure, that our readings are correct, Stella?..."

Commander-I who was sitting in his seat, looking at the screen and readings, asked as he rubbed his forehead. Feeling a headache, coming right up. Although he has a slight idea of what the readings are, he was more inclined to hear it from Stella who has more expertise in data. Although he was more...short compared to his subordinates, he has the maturity and experience of a Commander for an organization of this scope.

"Yes, Commander-I, there are potential rifts and connections which are connection our world to a new world which is not in our registry, nor in any records....however they haven't manifested as portals or anything catastrophic but whoever in that side, can come to our world through these links..."

Stella Watson, who is one of the buddy police operator spoke, tilting her glass as her blue eyes focused on the screen. Leyline although weren't highly disrupted had signs of disturbance, there is no reading value for this new world as if there is...no world. Peculiarity aside, some of the links can be detected around Cho-Tokyo, The more brand new [Abyss Prison] where many of the worst prisoners are detained and nearby the mountain range of Sengoku Academy...

Commander-I, let out a sigh, well this is already concerning, since one is linked to a city, another to a very secure prison they made and lastly it was nearby a mountain area and an academy. But they have to take preventive measures, before it is too late.

"Contact the [Hero World] for back-up, we cannot take any risks here. Takihara, go with Card Burn and tighten the security in the [Abyss Prison], we have to make sure that none of them escape through any means because of the new situation!!"

Commander-I, issued the new orders, Takihara, who is the chief of the Buddy Police, gave Commander-I a salutations.

"Yes, Commander-I, we will make sure that the prison stays secure!!"

Tsurugi Takihara, a man of brown hair and wearing his uniform, alongside his [Buddy] Cardburn who was a mecha in mini form gave Commander-I a salute and immediately headed off towards the [Abyss Prison]

"Agh...let's hope, things don't go out of hand..."

Commander-I, leaned on his seat and mumbled, another commotion was something they absolutely wanted to prevent after the incident with Chaos Control Company and how they are still recovering from it.

---

Meanwhile with Chaldea at the Same time:
Location: Wandering Sea
[5:30 pm]

The whole of Chaldea is in an uproar, since SHEBA, TRISMEGISTUS and other devices had confirmed the existence of Another [World] which was a huge thing. Although their current world is bleached, this was a HUGE and monumental thing which would have given Goredolf such credit for this that the whole Mage Association would be jealous of.

However, others weren't so happy. Sion and Da Vinci were scratching their head on this phenomenon they have found which have connected these 2 worlds together. After the sheer trial and obstacles they faced in Fae Britain, Ritsuka and Mash are taking some rest. However, Da Vinci who was taking rest, hearing this new report pushed it away and now doing analysis of this new independent [World] which they are linked to.

"Those two, need to take some rest. As much of a monumental discovery this is, if they don't take appropriate rest, it will be short lived."

Goredolf Munsik, the new director for Novum Chaldea grumbled, unsatisfied with the two geniuses of their organization, stressing themselves like this was odd. Sure, he can understand where they are coming from. A new [World] far different from their world and the textures, with completely different workings and new workings. So information was highly required for this new world and the measure of caution required to be taken for this new situation. But, that doesn't mean, he would want the two resident tech experts to stress themselves to fatigue.

"Your worries and concern are valid, Director but as you know, the minds of Da Vinci and Ms. Sion will not be stopped by anyone once they set their eyes onto something. Especially something novel like this."

Sherlock Holmes said, as he drank a cup of tea. He has been hearing the director's ramblings for a while and can understand his concerns. But frankly, convincing the likes of Da Vinci and Sion to take a break after hearing such a discovery is impossible and beyond power even for him.

After pruning 6 lostbelts after arduous difficulty and obtaining the necessary aid to kill the foreign god. This sort of odd and new breakthrough was beyond anyone's wildest expectation. It was such a breakthrough, even Gilgamesh showed interest on this which he later said that it was due to the fact that his [Clairvoyance] wasn't working when this new link comes into calculation. A world which even he couldn't see through his eyes was infuriating to him, so the King of Heroes declared immediately that once a conclusion is reached over this, he WILL participate in the exploration of this peculiar world.

Other emperors like Nero, Morgan and Artoria Pendragon showed interest on this as well. However, until a thorough report comes in from Da Vinci & Sion, no solid decision will be made for the time being.

However, there are some solid information such as,
- The mana of the world is abundant enough to be equivalent for the "Age of Gods"
- There are more than one world present.
- No hostility or any indications to show that it is a singularity nor some lostbelt.
- A literal portal is there in the summoning room.
- BB actively denied any involvement in this.

Once Da Vinci and Sion are back, a discussion will be done on who will be sent to the place for investigation.

---

For now, i will end this here, i will give more details here.

[Hero World] - A world which is present in buddyfight which is inspired by Super Sentai, Kamen Rider etc which has Mechs, Power Rangers, Battleships and superheroes alongside the Anti-heroes whom are called the Dark-Heroes here.

[Buddy Police Office] - A place which is present in the Earth of Buddyfight which is responsible to prevent criminal activity of humans and the monsters from different world. I will go more details on this, later on

[Chaos] & [Thunder Empire] - To give a short explanation, these are two rivaling factions where the [Chaos] wanted to turn the monsters into weapons and slaves to man due to the dangers and powers they inherently have, the [Thunder Empire] desires for monsters and humans to stand as equal and so, they opposed the [Chaos] faction. In the end, the [Thunder Empire] won the final decisive battle

[Red Alert - S] - A ranking of alert to show the potential dangerous of a phenomenon, S-rank being that, if not treaded well, this will risk the whole world to danger, so the highest alert.

[World] - Basically Fate has it's own many world, parallel worlds, timeline and all, so a [World] would mean a FAR different world with a whole different origin. It's like finding a whole different multiverse. Tbf, this is crossover so yeah.

For those who know Fate, i will tread and explain the stuff with Buddyfight
As for the Buddyfight, i will try my best to explain Fate, or atleast, The Grand Order part of it