Maybe this would work for other games too!? What does the "Enable GBA Union" mean in the Supercard software when patching a rom? It sound slike it would enable the rom to read the contents of the GBA slot for expanded information, but I am probably wrong as the makers write the Supercard is such odd ways. LOL!
Can't find any threads about this particular issue on GBAtemp or the wider intarwebz. Saw one video on YouTube that seemed relevant, but it was some dude with the same issue, no solutions offered in the comments. :/