I have bricked my Nintendo DS system (original/phat/fat) with flashme. The flashing only got to 2% and then got powered off. I used a DSTT cartridge for the flashing. I cannot replace the BIOS because, unlike the DS Lite, the BIOS is permanently attached to the circuit board. Interestingly, I can run normal DS cartridges by holding Start and Select, but when I do this with the DSTT cartridge, it gets stuck on the loading screen. I have tested the same cartridge on another DS, and it works normally.