i havent touched this game in a long time or even used whatever the split program is, but if anyone is looking for an auto splitter for this game i wrote one for visual boy advance. If i remember correctly youll have to still split after killing the final bosses. i dont remember which of these files even do what but i think that i used the US rom. heres a link https://drive.google.com/drive/folders/1FBC0YjIX_vjTG1zMAi1865-Er-JM1aEx?usp=sharing

rummaging through discord it looks like i either used this version of visual boy https://www.emuparadise.me/emulators/files/user/VisualBoyAdvance-1.8.0-511.exe or this one https://sourceforge.net/projects/vbam/files/latest/download

Thank you very much!

Agreed, I get lots of lag on DS when fighting 3 skeletons at once