If the device suffered a sudden power loss or had bad storage blocks (eMMC/UFS failure), the specific sector storing the DSI binary file might have become unreadable.
In the context of mobile hardware (specifically SoCs like Qualcomm Snapdragon or Exynos), the DSI is the communication pipeline between the CPU and the LCD/OLED screen. Unlike generic peripherals that can use standard drivers, specific display panels require proprietary configuration files or firmware blobs known as "binaries." dsi binaries are missing
The user is attempting to run a DSi-enhanced game in DSi mode on an original DS (Phat) or DS Lite, which physically lacks the hardware to execute those binaries. Impact on the User Experience If the device suffered a sudden power loss