In terms of evolutionary differences, the biggest difference between the first generation of evolution is the carp king and the tyrannosaurus rex, the "weakest" carp king who can survive anywhere, after evolution, it becomes the legendary ferocious tyrannosaurus who slaughters the village in anger, and the evolutionary conditions of the carp king in the game are not high, and more than 20 levels can evolve, that is to say, every carp king has the risk of evolving into a tyrannosaurus rex, and the animation gives the carp king some restrictions on the evolution method - the successful carp king will spawn in the evolution of the tyrannosaurus And why the carp king evolved into a tyrannosaur with a very different style, this should be explained in detail.
PS: This article is purely personal opinion, if there are any errors, please correct.
Carp King - Fish Leaping Dragon Gate:
The reason why the carp king can evolve into a tyrannosaurus carp dragon, there is a saying that it comes from the ancient Chinese myth "Fish Leaping Dragon Gate", according to legend, after Yu Pu Yi Que, the water is turbulent, swimming in the Mengjin Yellow River carp, along the Luo, Yi water retrograde, when swimming to the Yi Que Dragon Gate, the waves are monstrous, have jumped, intended to turn over, jumpers for the dragon, jumpers for the dragon, jumpers can not leave a black scar on the forehead; later generations often use the "Fish Leaping Dragon Gate" to compare career success or high status, and the legend of the carp jumping dragon gate must climb the waterfall, However, the Pokémon World's Carp King does not know how to climb waterfalls, and can only learn the skill of climbing waterfalls after evolving into a Tyrannosaurus Rex.
At present, the controversy over the "fish leaping dragon gate" theory, some scholars believe that the "leaping dragon gate" is not our traditional cognition of the carp, but the sturgeon with migratory habits - which is in line with the migratory characteristics of the carp king in the animation, and the purpose of the sturgeon migration is not to become a dragon, but to spawn, in the animation, the carp king will indeed evolve into a tyrannosaurus after the successful migration, it seems that the "leaping dragon gate" is successful, but in fact, the real purpose is still to spawn, that is, The evolution of the Carp King in the Pokémon world incorporates the habits of real creatures as well as myths and legends (pictured above is a painting related to "Fish Leaping Dragon Gate").
Tyrannosaurus rex without a dragon lineage:
Tyrannosaurus rex has a water system, and its body resembles an oriental dragon, so it is not difficult to guess that its prototype comes from the dragon in Chinese mythology and legend, the dragon is a water beast with dragon blood in mythology, but it is not a real dragon, only the dragon that has successfully crossed the robbery can incarnate into a real dragon, it may also be because of this layer of settings, so it seems that the tyrannosaurus rex of the dragon does not have a dragon system, and in the sixth generation of mega evolution of the tyrannosaurus, it looks more like the setting of the dragon side, so it still does not get the water system, the tyrannosaurus has a ferocious temperament, Even in Lake of Wrath there are legends about slaughtering villages, so mega tyrannosaurs attribute the water system and evil system.
Why did Tyrannosaurus have a flight system?
So, if the Tyrannosaurus rex that originally lived in the water did not have a dragon system, why did it have a flying system? This may come from the wind bag and the carp flag in Japanese culture - especially the carp flag, in Japan, the carp flag is mainly used to celebrate the Boys' Day on the fifth day of May, and every household will hang the flag in their yard with the appearance of the carp fluttering in the wind, which looks like flying in the sky, in addition, the carp flag and the above-mentioned story of "Fish Leaping Dragon Gate" also have a certain relationship, because it also has the intention of praying for the boys in the family to grow up soon, and "Fish Leaping Dragon Gate" The usage is the same today (the actual carp flag is pictured above).
Therefore, many mysteries in the tyrannosaurus - why the carp king has changed so much after the evolution, why the tyrannosaurus did not have a dragon system, why the tyrannosaurus had no wings but flew the system, they were all solved.