You can get cheat files for use with the ggpofba.exe. You can find them by digging around on Google. I once found one that had a ton of cheats for Neo Geo games, but I can’t find the page where I first got it right now. The first result on Google is this and though it doesn’t have any Neo Geo cheats, the Vampire Savior ones seem to work just fine. That said, there are a couple of big exceptions to FBA cheats.
First is Super Turbo. It doesn’t work with FBA cheats. If you set the 2P to have infinite health, they just don’t enter hitstun most of the time, or attacks might pass through them. It’s weird. Anyway, there are a bunch of really great alternative training room-setups for MAME that people have made. Including Pof, who set up Fightcade in the first place. Here’s a link to his one, I have it set up and it’s really good.
Second is 3rd Strike. I haven’t bothered to check if cheats for stuff like Jojo’s or Red Earth work, so it might just be CPS3 in general. I know 2nd Impact doesn’t work either. If you try to activate a cheat, you get a window pop up saying “Guru Meditation Error” or something followed by a string of characters. You can run a 3rd Strike training room pretty easily just using MAME though. I think even the standard cheats that you can get for MAME will work fine.
There was a Super Turbo tournament hosted by Arturo Sanchez on his stream a short while back (playlist here). I also saw some dudes doing a Puzzle Fighter tournament. Rotanibor is a very active Vampire Savior player who quite often hosts tournaments. You might want to keep a look out for tournament announcements via Twitter or stuff. There is also this page: http://www.fightcade.com/replay/. But that’s just for general replays (it’s a damn nifty page though, I like it a lot).