The Final Rumble is the biggest wrestling conglomeration, competing head to head with WWE and all it's competition around globe. The cause for The Final Rumble's sudden growth was obvious; in its namesake show TFR, it was just wrestling, but wrestling including all kinds of unusual characters with even supernatural powers. This was all balanced in way so two powerful beings could solve their differences without casualties or life-threatening injuries (More than those already cause by wrestling itself). This proven to not only be the most requested entertainment world-wide, but doubled as a great way for conflict-solving non-lethally.
Thus, TFR became the #1 wrestling show in the world, and one of it's most powerful organisations, but it also meant that powerful, evil beings sought to take control over it; luckily, it's loyal wrestlers are always ready to defend it if needed to. Although at times, some beings are too strong for even wrestlers to handle.
TFR's central operating location, save some matches at times, is the city of Coolsville, a city where absolutely all kind of people, beigns and cultures seem to gather. It's rumored that if needed, it could even operate as a flying city, but however these rumors are baseless. However, if there was instant need of solving a conflict, the absolute prevail of wrestling all over the world assures there's always a ring nearby. Or one can be created with magic.
There's a legend, that if someone managed to acquire all 4 of the mystical Mystic Belts: Belt of /v/, Belt of Jobber, and both Belts of Partnership, one would be granted a wish by The Holy Belt forming by the combination of the four. However, this is merely a rumor, but it has attracted quite a many wrestlers who tried and gave up, deciding to just continue their careers normally.