From the introduction:
Tie your shoes tight, pull on your jacket, and don your hat, because today is the day - today you start your journey in the world of Pokémon! You are a Pokémon trainer, and with your Pokémon at your side, there’s nothing you can’t do. Travel the world. Battle powerful gym leaders. Catch rare Pokémon. Make friends, and fight rivals. Get out there and be the very best, like no one ever was!
What is Poké no Tabi?
Poké no Tabi, meaning “Pokémon Journey,” is a Pokémon mod for Ryuutama, and it frequently references that book. If you’ve never read Ryuutama, get yourself a copy! I’ve reproduced some of it here with minor edits to fit the flavor of Pokémon, and I also refer to page numbers in Ryuutama when appropriate.