Edit system font from flash0 folder

[[Unknown]]

If you mean matching as far as it looking good, that is tricky. I had created this tool to allow for editing a font (it was quickly hacked together, just drag a pgf in):
https://ppsspp-font.netlify.app/

If you mean matching as far as the sceFont call, I'd recommend changing the game code to specifically load your file and not try to use an optimum match to any parameters.

-[Unknown]