Why does the meow of the Rockets in Pokemon talk?

I remember there are two answers, 1. Because of a meow mother, meow mother said, "Can you take care of me like a human?" Then meow meow learned to be a man. It seems that in the second movie, there is a liar. He said that he could understand elvish and he could speak elvish, so he asked the animal trainer for money to translate and be the elvish of the animal trainer, but he could not understand elvish and could not speak elvish. But one day they were discovered by Xiao Zhi, and the liar said that it was because I suffered a great disaster when I was a child and was trapped in a place where all the elves came to comfort him. After he escaped, he left the swindler's career. These words were heard by the rocket. Kojiro asked meow, why do you speak human words? Meow meow said that many people used to force meow meow meow, meow meow to work for those people, for better communication.