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A dream, a magic genie, VR tech, whatever, the point is you are now an Ace Trainer in a pokemon setting, be it the games, the anime, some headcanon concoction, whatever.
You get up to three pokemon. They will be your team for life. They begin at their lowest evolutionary stage, but can of course grow and evolve over time.
A few caveats; you will never be the main character of whatever story you're in. You can challenge gyms and win badges, maybe even make it to Victory Road, but you'll never be the champ and never be the hero. Something will always stop you, either defeat by a rival or simple misfortune. You can never get more than three pokemon.
Aside from that, you can live a full life as a regular person. You can travel, battle, take part in things like contests and pokeathelons, even fall in love and have children.
Yes, you can waifu gym leaders, protagonists and other notables, though its still up to you to make them fall for you.
What is your team? What region do you start off in? What do you do with your new life?