How to run Kof 2002? in RetroArch??
rom files: kof2002.zip, kf2k2mp2.zip
but I need a core to run but mame cores do not work any ideas??
As for Mame its a bit tricky for people new to it. You need to have the right MAME core and MAME rom version for it. IE MAME 2003Plus is a popular version to use and you need MAME version 2003+ roms to use with it. Some Roms require bios files and samples for them. It may need the NEO GEO Bios files to run them for mame as well, depending on rom source they may be inside the rom zip.
I don’t use King of the fighters 2002 MAME versions but I do use the NEO GEO AES versions with Final Burn Neo
This might help as a reference- https://retropie.org.uk/docs/MAME/
It may probably be against rules for me to post a link to roms or mention the rom site but you can visit a reddit channel “roms” to find them.