When Liuye traveled to a different world and heard words like immortals and immortality, he thought he had traveled to a world of immortality and was very excited, thinking that he could realize his dream of immortality.
But when he saw Bobo flying in the sky and Rattata causing harm to the farmland, he realized something was wrong.
"Isn't the world of immortality that I traveled to? Why are there Pokémon?"
