So I'm trying to make a rom hack of pokemon ultra moon where all battles are changed to double battles and changes to some pokemon to make them more viable. I used Pk3DS to unpack and edit the ROM. I've tried this before but last time when trying to rebuild the rom it would say: 'an unandled exeption has occured' just before closing Pk3DS entirely. I figured that I had done some weird input of some sort but I want to try to look what happened and figured it would be faster to just start fresh. So I got a fresh Ultra Moon ROM, changed some stuff and tried to rebuild it. But the same message occ