Ashes of the Past by Saphroneth

Disclaimer: This story doesn't belong to me, I posted it here just to use the audio book feature of the app.

After the world ended quite by surprise, Ash Ketchum has been sent back in time to the very beginning of his journey with a simple mission - prevent that from happening again.
Naturally, he's also going to go around Kanto solving problems, recruiting Pokémon and challenging the Pokémon League, because it's... sort of what he does at this point.