11 Oct 2020, 12:30

@bemandrill

should I copy/paste the official theme recalbox-next to the hare directory like adding a new theme?

Yes, you need to create a new theme, copying the original theme and modifying it as needed.

Could I create a new system based on games (no emulator)? I mean, a Street Fighter collecttion category.

I'm not sure, I never made this change, I know it was possible in the past, but some time ago some changes were intentionally "blocked", as you can see here:
https://forum.recalbox.com/topic/17186/problem-custom-es_system-cfg

Test it yourself, as far as I understand, you just need to add the emulators and cores in this part:

<emulators>
  <emulator name="libretro">
    <cores>
      <core>snes9x2005</core>
      <core>snes9x2010</core>
      <core>snes9x2002</core>
    </cores>
  </emulator>
</emulators>