Trainer Customization

Yeah I just started a new game with the current version. How do you get different clothes and hair in this one? I remember the old pokemon centers just had stores

You need to be in a PokeMall do to that. The bigger cities (Helios, Amphitrite, etc.) have these

Then earliest you can start customizing is Suntouched I think

Suntouched City is the first time you become able to do this