I know what your error is. If you didn't see my post, when I setup the repointing system for expanding pokemon, I didn't think anyone would want me inserting 400+ blank sprites and palettes. So, I inserted just one of each and had them all point to the same sprite. When you inserted your image, you didn't uncheck the box to fill the original sprite with free space. This erased the original blank sprite, causing the error on loading.