@JuanMena Thanks for the info. SoulSpawn let me know that Toki works fine with Core G as well. I found that Pac-Land works with Core A2. Robocop runs with Core D I believe - I've certainly been playing it. Like yourself, I use FBA's CPS1 core for Final Fight. Which RA version are you using?
1.7.5
The cores are from newer builds of Retroarch, only that I can't remember which exactly.
I too use the stand alone MAMEWII emulator to increase my MAME rom compatibility.