On the newest stable version some games lag like SVC Chaos and work perfectly on later versions.@pintcat @AyanamiRei0 there is nothing than can be done about kof2003 other than put and issue in the fbalpha2012_neogeo github, the game doesn't work as intended on that core even on the nightly version of retroarch on 3ds, since the 3ds version seems to be the only one affected they probably aren't aware of it.