It's obvious that MAME has something special that the other emus don't have. I thought I might try to figure out what it was myself. I used a hex editor and went through all the files in the emu. After nearly an hour, I found the dat file which was HUGE. After ages of searching through that, I found the KOF2k3 data which was the same as the ones that we all tried to use for Kawaks but didn't work. This was used in MAME: [Program] 271-p1.bin,0,100000,92ed6ee3,0 271-p2.bin,100000,400000,5d3d8bb3,0 [Text] 271-s1.rom,0,20000,c47f8ac3,0 [Z80] 271-m1d.bin,0,20000,0e86af8f,0 [samples] 271-v1d.rom,0,400000,d2b8aa5e,0 271-v2d.rom,400000,400000,71956ee2,0 271-v3d.rom,800000,400000,ddbbb199,0 271-v4d.rom,C00000,400000,01b90c4f,0 [Graphics] 271-c1.rom,0,800000,e42fc226,0 271-c2.rom,1,800000,1b5e3b58,0 271-c3.rom,1000000,800000,d334fdd9,0 271-c4.rom,1000001,800000,0d457699,0 271-c5.rom,2000000,800000,8a91aae4,0 271-c6.rom,2000001,800000,9f8674b8,0 271-c7.rom,3000000,800000,374ea523,0 271-c8.rom,3000001,800000,75211f4d,0 (It wasn't layed out like this) I tried it in other emus and it don't work but it does for MAME. Does anyone know why?