@blockaboots
gambatte_gb_colorization has reset itself back to ‘default’
just had the same problem and found out that the core options are not saved in the retroarch.cfg file.
instead I just added
core_options_path = /opt/retropie/configs/gb/retroarch-core-options.cfg
to my Gameboy retroarch.cfg file, which then will look for the ‘correct’ file, provided by patl