A-Cheng froze for a moment, then immediately understood what Xinhai meant.
Xinhai continued, "Swellow and Wingull can indeed evolve at just over level twenty, much faster than Pidgey. But whether they can carry a person after evolving depends not on their level, but on their size and strength."
He raised his right hand and indicated an approximate height. "Pidgeot is different. As long as it evolves normally, it can reach around one and a half meters tall, with a wingspan close to three meters."
"If it is raised well, it can grow to over two meters. At that size, carrying you alone would be no problem, even with luggage added."
"But after Swellow evolves, it is usually less than a meter tall, with a wingspan of only around two meters. It might barely manage to carry a child, but carrying an adult would be nearly impossible."
"Wingull's evolved form, Pelipper, is large enough, but that guy is amphibious. Its flight speed and endurance are both inferior to those of true Flying-type Pokémon."
Xinhai paused there. Seeing the thoughtful look on A-Cheng's face, he softened his tone. "Besides, although Pidgey evolves slowly, its growth at every stage is very solid."
"During the Pidgey stage, it can build a foundation. Once it evolves into Pidgeotto, you can start increasing its size. By the time it becomes Pidgeot, it will be fully capable of carrying an adult through the air."
"In comparison, Pokémon that evolve quickly may gain a new form early, but their physical and skill development often cannot keep up with their evolution. It is like building a house—the foundation is shallow, so no matter how fast you build the upper floors, they will not be stable."
A-Cheng nodded repeatedly, the hesitation on his face gradually giving way to seriousness.
"Brother