You are in the Pokemon world, you can choose whatever region to start in and you can have whatever Pokémon you want, though it might be more fun to start with something basic or even nothing.

once you have chosen a region you will be given a short exposition into the world, chosen region and hometown you start in, as well as a short nudge from the narrator onto the path to start your journey

here’s a small template that can help you

-Gender and/or age -Region -Hometown -Owned PKMN -Rival? Y/N