The World Government and the Marines were much greater organisations, so they could have many more learn everything and let them use it in a way that suited them as they found their own way of fighting, while other places were much smaller and had less development.
Some martial arts are only passed on to one student unless they never got the opportunity to be passed on.
Others were passed on in a dojo or a similar setting, but the students' learning would vary.
The only other way for a martial art to be more widespread would be for it to gain higher recognition and to be accepted by a greater power that would wish to incorporate and develop it further, like a kingdom developing their military power.
Each skill would need to be passed on from one person to another, or to many, to see how each person would learn it in their own way and find a way to use it for themselves.
Alyssia did not slack when it came to collecting new skills for her martial arts skills as she visited anywhere she could where there was a very small or large place of learning a certain style.
There were even some places that she visited just to see if there were any hidden gems somewhere random, or if there was a small competition being held where some fighters would be drawn.
She was not against the idea of visiting some less open places that were far from being considered legal, like some underworld fighting matches where fighters could fight with their lives on the line.
Even after practising and finding new ways to develop and use certain skills she found, it was still far from enough to fully perfect everything, as it would be developed solely by her and the system.
That was why she still had to find others to pass them on to who could develop them in new and interesting directions, which was why she passed them down to others in such a way.
Those closest to her in terms of body type were the Mink Tribe, so Zou had been the main place to benefit from her in such a way, as all kinds of Minks had been learning a style of martial arts that they took a liking to.
Some martial arts ended up working along with their advantages, while others helped to overcome certain weaknesses they had, but they kept being developed with each adjustment that would be made by those learning them.
Some martial arts were mostly created to suit the male body rather than the body of female body, so females would have less success in training in them, and constant training could lead to injuries early on.
It was the same for any others that were more suited to someone with a certain body type, who was created around a certain body height and weight.
If the slightest thing was different by a little too much, then it was possible that it would be more difficult to use some of the movements.
Some body types were much wider or taller, while some were more muscular or flexible than others, allowing different ranges of movement.
It was the same for those who had other body parts or features that were a part of them, which could make it more difficult to practice certain types of movements.
Even Alyssia had to struggle in some areas to apply some movements to suit herself as she was testing out the various restrictions and capabilities of her body.
Her tail played a major role in adding extra balance and another method of combat to add a variety of different moves to her martial arts style, but that came with certain restrictions on what type of movements she could not make as a result of her tail getting in the way.
While some had to follow the forms in martial arts forms as they transitioned between them according to how it was shown, Alyssia had to do that while having to think about how to perfectly position or swing her tail so that she could perfectly transition between them.
If one movement was not perfect, then it was possible that her tail could end up obstructing her movements, which would mean that she would still be quite far from perfecting that type of martial art to suit herself.
Those who were the closest to the same body type as Alyssia were most suitable for applying anything to herself, while others could be applied to others from different Mink Tribe categories of races.
Even the Fishman and Merfolk martial arts had received many alterations and revisions as those learning different styles had begun to appear in the Ness Kingdom.
The same could be said for anyone else who was from any of the other existing races in the One Piece world, especially those who had settled in the Ness Kingdom and found their way to begin learning a certain style of martial arts.
The skills collected from each of them when they did that usually resulted in more interesting results that were more fun and had a unique touch in them, while their developed skills were collected by her using the system to develop the system skills.
The same could be said for Ness Kingdom, which was a newly formed kingdom that was still in its infancy.
Many cultures were coming together, and the Ness Kingdom was still being developed further as new things needed to be tackled each time, so they had to find solutions that could make everything easier.
Existing cultures, ideologies, and much more needed to be considered from the perspectives of the people who had lived their lives in the world, whether it came from the lowest of the classes, like the previous slaves or those in the upper class.
A delicate balance needed to be maintained to keep everyone happy, so enforcing big changes that they would not understand or agree with was not the right path.
They needed to do it together, hand in hand, rather than tell them what they had to do.
Even if someone like Monera was carrying out what Alyssia had entrusted her with, the ideals that had been passed down to her had an influence over her in some ways that made her do things as she did up to the present.
It was one of the reasons why she was so well-liked by the people of the Ness Kingdom and was seen as the ruler most suitable to lead them over anyone else.
If someone else was entrusted with the same thing, it was not guaranteed that the result would be the same for them, as they would make different decisions and would act differently, resulting in different results, whether good or bad.
It was her character and her determination that let her make the decisions and take actions as she did without needing to follow directions, which resulted in her success, as she did not hesitate to help others and to reach out to them.