This guide was made using pwndnoob's Marathon run in June of 2022. Watching his video is a great way to see the things talked about in this guide if you don't understand something. I wrote it as I was learning the route, so it's very beginner friendly.

pwndnoob's run: Guide: https://github.com/FayteFireix/NewPokemonSnapSpeedruns/blob/main/New%20Pok%C3%A9mon%20Snap%20-%20All%20Pokemon%25.pdf