AC versions of Muteki's characters
I was looking through the Guilty Gear character stats and noticed that most characters have an (AC) version listed.  I then went to the files of my version of these characters and could not find a seperate .def version of these characters to switch too.  I was curious if these (AC) versions were some kind of patch or if I simply missed the way to access these versions.
It's usually somewhere in the AI.txt or similar files. There's some option that allows you to pick between normal (GG), AC or EX. Note however that not all characters have AI for all modes, but at least I'm fairly sure we have all variants that do exist on SC.