I don't know...That hasn't ever happened to me. I have 2 files (ones a friend's) mines been going for 190 hours and the others been going for about 20. So that would kinda rule out the idea of the files being too big, as mine are bigger. How old is the game? I've had mine since Christmas of 2004 (last Christmas) and everything's going fine with it. Maybe you got a faulty cartridge? I wouldn't think it's the GBA, as they dont hold any memory at all. All the memory is stored in the Cartridge so its probably the game rather than the actual GBA. I dont know how to fix it, so yes, you are royally screwed