I don't know where to post this suggestion but for what I've played (not in my current account, I had another character with some more distance adventured)
Quest NPC — I wish to ask about some NPC in some cities per region to give some kind of Missions in which you win something either useful or vanity to use. Maybe small items you can't find on stores or hats/pants/t-shirts; or some kind of titles that give some small effect in game? It would be of help for those who can't really afford to pay for stuff while making relatively more content for the game. Missions can be as easy as capture certain pokémon, or as difficult as a strong NP C to defeat or to look for some object in the overworld. It would give even more vibes of an actual MMO in my opinion.
Examples:
