I fixed it with Cave Editor. AND THEN! I went and deleted all of the code in the EXE file using ResHacker.exe (Resource Hacker. It allows the changing of executable files.) So now I have to re-extract the exe from the zip!
(The problem occured with the Pre-Patched English from the main page and the Curly mod from http://www.cavestory.org/forums/threads/1174/ which works fine when I take away my edited mychar.pbm) I assume I screwed something up when saving. I saved as a 24-Bitmap pbm file. Which is what the game...
I was editing graphics from Cave Story Plus, trying to more or less make a mod of it. And I after editing ItemImage.bmp the items don't display correctly. And I tried naming it as itemimage.png and rename it to the .bmp file but that kept the game from loading. Does anyone know how I could fix...