The “Registro Cero” (“Zero Registry” in English), also called the Level Zero Threat Assessment Brief, was one of the darkest chapters in recent backstory of Suocé and is tightly integrated with the backstories of characters such as Ravir Eisenhorth and Machalí sol Linaros. The Registry itself is a Threat Assessment Brief compiled in Suocé in year 3728 by the National Conference League, the Special Operations Police and the Suocé Elite Four to enumerate some of the top tier local Trainers that could pose threat to societal order in the region.

The document is a listing and categorization of eleven (11) Pokémon Trainers from the Suocé region and was built from a number of sources, most of them tied to information recovered or seized during the Fall of Pokefutures, including recruitment plans, psychological profiles, battle proficiency assessments, records of private communications, etc. Pokefutures originally intended to use this information to recruit such powerful and capable Trainers to their ranks by any of a number of their proxies, and eventually lead them into research and operations for the conglomerate.

These Trainers were chosen because their combined capacity put them, in the words of some Pokefutures offices, in the realm of “securing the power of small city-states for the Corporation”.

1. One unrevealed Trainer
2. One unrevealed Trainer
3. One unrevealed Trainer
4. One unrevealed Trainer
5. One unrevealed Trainer
6. One unrevealed Trainer
7. One unrevealed Trainer
8. Talea Covarrubias
9. Silgra ins Bertel
10. Machalí sol Linaros
11. Ravir Eisenhorth

With the fall of Pokefutures, the intentions of the conglomerate regarding the records were leaked to the public, as were most of the documents that the Suocé Government eventually used to assemble the threat brief.

Facing political pressure from all sides, knowing that if Pokefutures could not recruit those Trainers other private or foreign agencies would be quick to try, the Government hastily built a threat assessment folder from which the decision was made to launch an emergency operation called Operation Book Zero, whose purpose was to “isolate and apprehend the Trainers, preventing [them] from leaving the country or sheltering in corporate facilities by use of state-sponsored force if necessary”. Unfortunately, Pokefutures' overselling of their plans and an eagerness of officials at various layers to execute a shocking, proficient response on an election year, prompted a harsh and exaggerated response by enforcement officials in their first approaches to the targeted Trainers, which eventually escalated the conflict.

Once the first few Trainers were arrested and isolated, the rest quickly gained understanding of the situation thanks to further leakage of documents. In their eyes, the legislature and the Conference League had turned on them and were trying to sacrifice them in order to validate the “stature” of the region's Pokémon League and placate an overeager government branch. The Trainers suddenly were left with no perceived allies in a confrontation against all of law enforcement, Pokefutures splinters and corporate hunters.

Four weeks after, with the situation already tense and five of the eleven Trainers still at large, two unexpected events prompted a schism in the execution of Operation Book Zero. First, while attempting to hunt down high-risk Trainer Silgra ins Bertel, the Trainer managed to ambush a SWAT team sent to capture her; one of the SWAT officers and one of their Pokémon died in the confrontation, the first and only direct casualties in the conflict. Less than 48 hours later, another SWAT team intercepted agents of a foreign agency in the neighbourhood of Ravir Eisenhorth's family and, assuming that the Trainer was trying to offer foreign allegiances, they engaged in combat without consulting with their HQ. During the confrontation, Ravir's father and his younger brother Megrez Eisenhorth were severely injured, prompting the Trainer to switch to lethal response. A third of the entire SWAT team was left injured or maimed and the Trainer left an ultimatum to the media and the Suocé government before escaping. These two events prompted all of the five remaining Trainers to resort to lethal force upon provocation and to avoid urban areas, but also turned public opinion strongly against the government response after comparing the current results to the worldwide mess.

After a week of careful operations, one Trainer was captured while they were trying to fend off a Pokefutures splinter cell and another Trainer was captured trying to leave Pradeimie; the latter operation taking place within the confines of the Cadrícean Widefields Sovereignty led an angered response of the leader of the Guardian Forces, Terrakion, who was not looking the human response to the event any favourably after Virizion had already led a military draft in response to the Fall. Suddenly the Government had to add the potential of a Sovereignty turning against them to the ongoing conflict.

A series of Congressional Hearings was scheduled to take place where the directives of Operation Book Zero would be unveiled and revised, and a request would be made for a foreign peace force from Caledoria to manage the conflict. This scared a number of rogue League officials into destroying various documents of projects unrelated to the event. Another of the Trainers in the Registry, Machalí sol Linaros, attacked a government facility and leaked information tying recent Government and League disagreements to dealings with the International Frontier Board, which further mined trust between the League and the Government until the relationship was no longer tenable.

Two weeks later and after the capture of Silgra, only Ravir Eisenhorth and Machalí sol Linaros remained at large and the government proving incapable of earning their goodwill. After a round of hearings and considering the failure to close the intervention peacefully, the then-President of Suocé issued an emergency mandate to cancel Operation Book Zero, arrest all personnel that had participated in the elaboration of the brief and send the nine already captured Trainers to neutral ground in the Caledorian embassy where they could safely wait for a political conclusion to the matter.

After a week of hearings, the local Conference, the Ascapian League was cancelled without plans to resume, leaving 10 Gym Facilities and over 4,500 Trainers out to aimlessly wander in the open. With news that the incumbent Champion of the League, Nadia Shepard, had disappeared in the conflict, the President of Suocé handed over her resignation both from office and from the political arena.

As luck would have it, Pokefutures and the Suocé Government were right in holding Ravir and Machalí as the most dangerous threats in the region, just not in the way they expected.

Champion Nadia Shepard had been eyeing an even larger threat to the region when she disappeared, and she used the two Trainers left as bait to force the assailants to reveal themselves ( “Interim” (TBA) ). The threat was effectively contained, and eventually Ravir and Machalí would become prime candidates to succeed Nadia in the position of Champion. It would be Ravir who would end up securing the role, though Machalí would be keeping an eye behind.

Ravir would prove his credentials by single-handedly liberating the city of Désona during their siege under a Black Thumb resurgence, whereas Machalí would lead the closure of the war between the La Plancha Sovereignty and the Ísparus Draconic Claim. Moreover, under the direct influence of these two Trainers, very strong Trainers would emerge such as Adanei Varan and Thom Eisenhorth who would later overtake the resumed Ascapean Conference League.

The following Trainers were listed in the Brief, in relative ascending order of Threat Level. The operation was closed after eight weeks of hunting down.