>>25064602in my view, it would be important to make sure that the character in mind has another set goal if they're already experts. If they have already beaten the champion, for instance, maybe they want to do something else, like participate in tournaments, get involved with the community or system, or just continue sightseeing the world. Since they have already learned the basics of pokemon battling, expereinced gym battles, or even busted some evil team group, there would still be a strong emphasis on the journey, but battling might not be the top priority.
If you jump straight into battle from the start, you might run into the risk of showing off too much of their power at once. This can be avoided by having the opponent equally or even stronger, or just have the trainer teaching others or someone.
You could have them meet familiar people, or have evidence of their works scattered throughout backstory or whichever region they went.
