This is not a crossover. Let's make sure that's clear from the get-go. This is, first and foremost, a Fate/ roleplay in a world bound to the rules of TYPE-MOON's "Nasuverse" setting, even if the nature of this roleplay is heavily, heavily influenced by a different setting on the conceptual level.

Words to explain how an absurd timeline like this happened could be thrown around. Phenomena designated for pruning. Tethering of the alien god’s tree. Lostbelt Depth. Simulation born by the bottomless Klein Cube.  We will not bother with those justifications, however. They will not affect this story, so there's no point in dragging over them. 

Let's just get to the explanation, instead.

[center][img]https://i.imgur.com/it8Ozfe.jpg[/img][/center]

[hr]
In the Age of Gods, under the rule of the Hero-King Gilgamesh, the greatest Divine Beast descended to plague the lands. It ruined crops, it devastated cities, it devoured lives. 

In the Panhuman History of the Human Order, the Divine Beast was slain through the coordinated efforts of the Hero-King and his one true friend. 

In this world, however…

[quote][i][color=a2d39c]“Capture successful! We’ve got it, Gil!”[/color]

[color=fff79a]“...hm. How interesting. This feeling...I would like to see the ends that it reaches.”[/color][/i][/quote]

...the Hero-King and his friend, instead of slaying the greatest Divine Beast, wielded the chains of heaven to ‘capture’ it, for no other reason than to anger that temptress who had unleashed it. That grand monster was made tame, and the Hero-King developed a taste for such things. As he collected the treasures of man during his reign, then, he also sought out this feeling further. He traveled the world over, and captured all members of the Phantasmal Species that caught his eye. The hydras of Greece, the naga of India, the oni of Japan, all such beings were brought under his yoke.

In the modern day, he is known by many names. The King of Heroes. Gilgamesh. “Goldie”. But, different from the Panhuman History, there is one addition to this list which does not exist in any other timeline.

“The First Pokémon Master”.

[hr]
It is our pleasure to welcome you to the fifth official Japanese National Tournament for the Pokémon League, hosted by Fuyuki City. Whether by skill, guile, or dumb luck, you’ve managed to make it to this stage, so congratulations! The winner will get the opportunity to challenge our League’s very own Elite Four!

The rules are very similar to the Regionals. You and the other competitors are permitted to bring one Pokémon to the tournament with you, registering this choice in advance. During the  tournament, you are free to roam the city as you see fit, and are to battle the other Trainers. Battles may occur either officially through announcing a challenge, or unofficially through such things as a ‘sneak attack’. You have all signed the appropriate waivers, so neither the Pokémon League, Fuyuki City, or your competitors are liable for damages that occur to you, your Pokémon, or your property during the tournament, including death.

The tournament will occur within Fuyuki City. We have released some Phantasmal Species within the city limits that you may attack or capture as you see fit. However, any trainer who has captured or contracted more than two Pokémon at any given time will be removed from the competition, due to safety concerns of brain stress from ESP overuse. In other words, you can capture one wild Phantasmal Species, but if you want to capture a second, you’ll need to release one of the two you already have. 

Use of magecraft is permitted. Concealment of the tournament is encouraged so as to not disrupt the daily lives of Fuyuki residents, but is not mandated. 

Property damage that you incur will be billed to your estate or removed from your prize winnings. A significant number of Fuyuki residents have chosen to disregard the evacuation notice, but damage to them is still to be avoided; excessive injury to Fuyuki residents is cause for termination from the tournament. 

The tournament duration is 7+1 days. After seven days have passed in the standard manner, if more than one participant remains, remaining participants will be placed into a single-elimination series of tournament-style battles until one remains. 

Good luck to all competitors!

[hr]
[hider=More Setting Information]
Before the King of Heroes departed from this world, he set up conditions for the coming Age. Designing great pillars with an Authority of nation-building, he created a system that would change a fundamental rule of the world as it transitioned from the Age of Gods to the Age of Man. This was, of course, a manufacture of environmental pseudo-True Ether and an alteration of the shifting textures of the world, so that Phantasmal Species could still roam the world. Elementals and Divine Spirits were nonetheless ejected, but Phantasmal Species alone were permitted to coexist with the Age of Man. This has sent ripples through history, but a play-by-play of 4600 years of history will not be provided here. 

Due to this, much of magecraft has long since died. As Phantasmal Species roam the land, concealing the existence of magecraft became impossible, and its mystery has gradually diminished since the end of the Age of Gods. Its vestiges have been collected and combined with human science, though, and has survived as a hollow shell of its former self. 

The true magecraft of the modern day, then, is cast through Phantasmal Species. As beings which are natural mysteries themselves, they enact nature interference similar to magecraft merely by existing. A person who has the aptitude for the old form of magecraft (Magic Circuits), who has access to a certain abnormal channel of the brain (a specific form of ESP), and who contracts with such a being, then, can use the beast’s existence as a means to enact ‘something like magecraft’ based upon the nature and concept of their contracted partner. 

These individuals are called Pokémon Trainers. 
[/hider]

[hider=Pokéballs]
Since the days of the King of Heroes, mankind has sought ways to capture the Phantasmal Species. In the Age of Gods, ropes of True Ether that borrowed the Chain of Heaven’s concept were used, and over the years, innovation after innovation has been made. 

Currently, the common practice for capture is through what are called ‘Pokéballs’, constructs made of a pseudo-True Ether designed by the world’s foremost expert on binding familiars, Archmage Makiri, also known as Professor Z’Oak’En. The exact process by which they work is not known, but they are a combination of familiar binding, pseudo-True Ether, spatial quarantine imitation, and a litany of other things. This innovation has defined much of the modern day. 
[/hider]

[hider=Pokémon League]
The global organization that oversees all Pokémon-related activities, spanning countries, cultures, and religions. It possesses multiple subdivisions, for instance the Clock Tower and the Vatican. At its peak are the Elite Four, the greatest trainers of the modern day, and the goal for anyone seeking to reach the apex. 

[b]Staff Secretary: Zepia Atlasia[/b]
Tournament organizer. Head of logistics. A brilliant mathematician who plans everything down to the most minute detail. There are rumors that he can see the future. 

[b]Elite Four: Narbareck[/b]
The Church’s greatest. A descendant of one of the League’s founding members. A terrifying gatekeeper. 

[b]Elite Four: Lorelei Barthomeloi[/b]
Vice-director of the Clock Tower faction. Also known as the Queen. One who overwhelms the opposition with sheer force, she is often called the most supreme trainer of the modern day. 

[b]Elite Four: Jewel Killer[/b]
Director of the Sea of Estray faction. A shrewd genius who keeps his cards close to his chest, and a snake who conceals himself from the limelight. 

[b]Elite Four: Lady of Eternity[/b]
True name unknown. Appearance unknown. Aptitudes unknown. 
[/hider]