chacal231077
Grand Master
Hi! 
I came across a post where someone posted a list of NvRAM files with unlocked characters.
https://www.reddit.com/r/MAME/comments/n2rewt/useful_nvrams/?show=original
It seems to work on the original ZN hardware by programming the Atmel AT28C16, I'll check it out anyway.
Not all the games in the ZN catalog are there.
If anyone can create an NvRAM file for Atlus' Heaven's Gate and Battle Arena Toshinden 2, I'd be interested.
Thanks.
Arcade Fighting Games NVRAM.zip

I came across a post where someone posted a list of NvRAM files with unlocked characters.
https://www.reddit.com/r/MAME/comments/n2rewt/useful_nvrams/?show=original
It seems to work on the original ZN hardware by programming the Atmel AT28C16, I'll check it out anyway.
Not all the games in the ZN catalog are there.
If anyone can create an NvRAM file for Atlus' Heaven's Gate and Battle Arena Toshinden 2, I'd be interested.
Thanks.
Arcade Fighting Games NVRAM.zip
It contains the NVRAM file with every character unlocked for the following games:
Dead or Alive ++
Rival Schools
Star Gladiator 2
Ultimate Mortal Kombat 3
SoulCalibur
Tekken 3
Tekken Tag Tournament
Street Fighter Alpha 3
Kikaioh [Tech Romancer (J)]
Street Fighter EX
Street Fighter EX 2
And a bonus: the save files for Marvel vs Capcom 2 (not for MAME, but works with Demul/NAOMI emulator)