The Legend of All Members of Urban Pokémon

200 years ago, Pokémon suddenly appeared in this world.
"The beginning is Latias, who will become a beautiful girl?" Ye Xuan looked at his initial elf in surprise: "So good at playing?!"
"Hello, I'm here to kick the gym." Ye Xuan threw out a steel pillar: "I only have one, you can go anywhere, and if you can kill it, I will lose."
"Why do you think my elf has never been seen before?" Ye Xuan: "Oh, I almost forgot, there are no legendary Pokémon in this world."
"It's best to send the main force to the national competition?" Ye Xuan thought about who to let go: "What about Kyogre, Groudon, Korakuza, or Mewtwo?"
"Uh, Dialuga and Palkia are fighting again?" Ye Xuan: "Pluto Dragon, go and teach them a lesson."
"If you have the ability, you can also choose us!"
Ye Xuan looked at the champions and kings from all over the world: "Go, Alpaca!!!"...