EDIT: Thanks to MegaShocked who helped me a lot!!
Note for other people who may encounter this problem (e.g. my future self): You should change the C rom size in neogeo.xml !
I should not do this. Many people have warned me, do not fucking attempt again to develop a game on the Neo. But here I am. Development is to me like meth. It only does harm, but I can't stop it.
char.bin from Datlib
romwak /w to split, use roms as is - Glitch as in picture
romwak /w /f - Glitch
any form of padding - No sprites
At the RGC 2019 Furrtek helped me, solved the problem in a split second. I can NOT figure out a solution now. I remember it was about the C rom size but I checked any padding or flipping option with no success.
Sometimes I say to myself I should go and put my brain in the trash where it belongs..