Pokémon

The Book floated over to a portal and saw people using strange animals to fight each other, trap them in little balls and make them slaves. It noticed a shift in the portal and realised that it splintered. It dove in and fell to the ground. It felt someone or maybe even something touch it.

To the weirder of this book,

Know that you hold my most powerful creation, The Reality Book, with this anything you write in it will become reality. Yes reality will mild itself around what you have written only you as the owner will have knowledge about both realties. This means you are now my amusement little being. So go amuse and entertain me, I’m watching but will no longer be seen or heard from after this message.

Signed A Bored as fuck all powerful being.

Which version of Pokémon does the book land in? Which character has the book? How do they use it?

1) Games

2) Anime

3) Manga

Please make all your suggestions as detailed and in-depth as possible.

Feel free to add to any of my stories.