WARNING: Decrypt9 added a native save dumping and injecting tool that works way better than AGBSave9, you can download it here.
I'll be keeping this guide around for historical purposes, but you should use Decrypt9 instead.
Dumping and injecting GBA VC saves with AGBSave9
I'll be keeping this guide around for historical purposes, but you should use Decrypt9 instead.
Depreciated tutorial here
Dumping and injecting GBA VC saves with AGBSave9