Regarding the awakening of the rubber fruit, and its true ability, there are many views on the Internet at present: some people say that the rubber fruit is actually a sol fruit, some people say that it is an oil fruit, and some people say that it is a sun fruit, and so on. Anyway, the basic idea is to find something else to replace rubber.
The "legendary fruit" mentioned by the five old stars refers to the rubber fruit, which is not doubted by the chaotic stepman; the name of the rubber fruit is false, then its real ability is not rubber, and this logic is also correct. It's just that in the view of The Chaos Jun, this new ability to replace rubber must also meet the following conditions.
It has certain rubber characteristics
Luffy's fruit upgrade does not mean that it is necessary to completely change a fruit, and it cannot be beaten with the rubber eight rods. Some of the basic features of rubber, such as elasticity, stretchability, inflatable, non-conductive, etc., new abilities must also be possessed, otherwise they will conflict with the previous plot, Luffy's skill system, and even the character image.
Take non-conductive, Luffy's new ability does not have this one, first of all, Anilu had to jump out and oppose: you are not an insulator, how can you be immune to lightning? This plot can't be rounded. There is also stretchability and inflation, if removed, how does Luffy use the fourth gear? Luffy developed a lot of skills, what big ape king gun, ape king group crow cannon, without four gears are all wasted.
To change the fruit for Luffy, it is not only the ability, but also Luffy's original skill system, and all the efforts of Luffy to develop rubber fruits. From the second and third gears of the Justice Island to the four grades of cultivation in two years, the rubber fruit has poured too much effort into Luffy, and it is always impossible to let Luffy redevelop the fruit for the sake of combat strength, and the previous efforts are all in vain, right?
There is also Luffy shouted 20 years of "making cats and making cat trouble", which has become a precious memory of Haimi, and you let him not shout in the future? So even if Luffy doesn't eat rubber fruit, he won't have anything to do with rubber after awakening. The new ability will still retain some of the characteristics of rubber, and Luffy is still the sunshine boy who likes to extend his arms and swing around.
The name is very powerful when you hear it
The legendary fruit was given another name, the rubber fruit, and its real name is unknown. This is very similar to Roger's situation, when the "D" in Roger's name was hidden by the Navy and became "Golden Roger", just so that people would not know that Roger was one of the Ds. The same is true of the rubber fruit, once its real name is exposed, it will definitely cause some kind of consequence.
The name of the Demon Fruit is not long, that is, it is a word to summarize its core ability, such as the Shock Fruit. In such a short name, it is impossible to contain any historical secrets, and it cannot be called "the fruit of D" and "the fruit of Joy Boy", right? Therefore, the real name of the rubber fruit is hidden, for only one reason, that is, the name of this fruit, at a glance, you know that its ability is very anti-heavenly.
For example, Kaido's esper species fish fish fruit green dragon form, look at the name to know very strong, the legendary green dragon well. This kind of strength must be very straightforward, which can be seen literally. Like oil fruit, resin fruit, is a kind of life substance, just look at the name, can you feel its strength? Such fruit names don't need to be hidden at all.
The legendary fruit, its name represents infinite possibilities, enough to make all the powerful people on the sea crazy. Only in this way can we explain why it was renamed, using the plain name of rubber fruit to make the strong lose interest in it. After all, this is the fruit of Joey Boy, really snatched by a certain D one of the strong people, developed to the awakening, the Draco is finished.
The fruit principle is well understood
Some anime, like magic forbidden and spell return battles, have some relatively complex abilities, such as the vector control of one side, the five goku's no lower limit technique, and the scientific principles involved in it are not clear at a glance. But in One Piece, this has never happened, and Oda's explanation of the Demon Fruit's abilities is very simple and easy to understand.
To put it bluntly, to understand the fruit ability in One Piece, it never needs to be a professional scientific knowledge, basic common sense is enough. Therefore, Luffy's real ability should not be sols and gels, because it is too complicated. After Luffy developed a skill, he had to explain what is Brownian motion, what is the Tyndall effect, tired or not? Oda never did this kind of professional work.
From Luffy's own point of view, he is also not suitable for sol fruit. If it is French or Usopp, it is understandable to get a sol fruit, after all, they have a wealth of physical and chemical knowledge and know how to develop. Change to Luffy, does he know what the sol is all about? Luffy has always disliked reading, and his knowledge is not high, and Oda can't turn him into a science master in order to develop fruits, right?
So the real ability of the rubber fruit must be simple and rough, very easy to understand, in line with Luffy's straight-forward personality. And this ability is easy to develop a powerful skill, so that it is convenient for Luffy to open and hang.
summary
Rubber features, powerful names, simple and rough. These three strips added together, and The Chaos Jun came up with a name: The Fruit of Change. Its ability is the ability to freely change the shape of the body, change the physique, and even simulate other demon fruits, in short, anything can change.
Changeable is a concept, not a substance, and oil, resin these are not the same, it is not limited by the characteristics of matter, has unlimited possibilities. Such a fruit, both worthy of the word "legend", its ability is not too complicated; its name deserves to be hidden, and it will not affect the plot of the rubber fruit, because the change also includes the change of rubber.
Once the "fruit of change" is awakened, the body of the capable person will melt and become a pool of water, or "plasticine". The so-called fruit awakening is actually the reduction of form, and that pool of "plasticine" is the initial form of the capable person. In this form, the capable person can develop the fruit at will, and what kind of kneading it can be kneaded into whatever it wants, depending on the size of the capable person's brain hole.
Luffy's level of knowledge is limited, but his imagination is very rich, and he can often develop strange moves such as rubber mouth swallowing, rubber daze, rubber UFO and so on. When the "changeable fruit" arrives in Luffy's hands, it will surely be able to deduce more surprising changes.
After all, One Piece is a work full of wonderful fantasies, and its romance lies in this. As the protagonist of One Piece, Luffy has a kaleidoscopic fruit that can be integrated into various fantastic ideas, is it not a matter of course?