RetroArch cores accepted or not? Thanks! )

Ok Thanks!

Ok thanks . I am using RetroArch. And options look like this (https://imgur.com/a/qw0I01P)

What about ROM's. Where you get your version? I mean the version that could be accepted in leaderboards.

And also Kega Fusion looks ok too, is it ok to use Kega?

Hi , What Emulator shoud i use to speedrun coop any%? Thanks!