Hello,
The console is: rg35xx plus with PIXIE (7c4e6a8)
I have a quite specific problem - in other games on GBA with gpsp or mgba performance with achievements and patched roms is great but specifically in Pokemon Unbound - Professor Oak Challenge the lag is horrible, it makes it unplayable.
I noticed that on patched rom when it loads the fps is below 20, but as soon as I turn off achievements for this it jumps straight to 60 (maybe more).
Maybe the issue is that this specific subset on retroachievements has the most achievements on site, if yes, is there a way to optimize the config to get back to 60fps (preferably on mGBA core)?
I tried different cores:
- gpSP
- mGBA(default core)
Different governors:
- ondemand (default governor)
- performance
The rewind function was turned off on all tests.
Tried restoring retroarch settings to default via Task Toolkit and only setting up the achievements and fps display settings (didn’t help).
Any noticeable difference in performance was when I turned off achievements in retroarch. //I would like to prevent that since achievement hunting was the main reason why I bought this console
Just to add, in one of the BEANS MuOS version when I last played I had quite good performance of this rom and this patch on gpSP (but I’m dumb and didn’t backup config before reflashing the SD card).
Not sure if I included all info, I’ll gladly answer any questions to help you help me 
If it’s not the right place to ask for help with this problem could someone point me in the right direction?
Thanks for help,
Ciechom
//not sure if permitted but I can edit this post to include link to the retroachievements page of this roms subset