Pokemon: The One Who Corrects the World's Timeline

That day, Su Zhe was leaving school as usual when he suddenly discovered, to his astonishment, that the world had undergone a tremendous transformation. Pokemon had appeared in the real world, yet everyone seemed to take it for granted. Su Zhe had no choice but to learn the rules of this world's game. But is the present world really reality? Could there be another possibility? The parallel worldlines have suddenly split. What are the Correctors carrying on their shoulders, and what are they pursuing?