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| Feature | Clean ROM | Dirty/Bad ROM | | :--- | :--- | :--- | | | Original, unchanged | Modified or corrupted | | File size | Exact size of cartridge (e.g., 128MB, 256MB) | Smaller (trimmed) or different | | DSi binaries | Fully intact | Missing or overwritten | | Checksum | Matches known good hash (MD5/SHA-1) | Does not match database |
The second half of the error message is written in slightly broken English, but the meaning is crystal clear: | Feature | Clean ROM | Dirty/Bad ROM
The error is not a bug—it is a of DSi hardware and accurate emulators. It protects you from running incomplete or corrupted code. Now that you understand the “why” and the “how,” you can fix it in minutes. Select your game ( [TitleID]
Select your game ( [TitleID].nds ) and choose . Crucial : Do not select the "trimmed" version. On a DSi : Use GodMode9i . Run GodMode9i and select "NDS GAMECARD" . Select "Full Dump" (avoid "Trimmed Dump"). Method 2: Verify Your ROM Online Run GodMode9i and select "NDS GAMECARD"
to run "DSi-Enhanced" games (like Pokémon Black/White or Black 2/White 2) from an SD card on a Nintendo DSi or 3DS. It indicates that the ROM file lacks the specific data required for DSi mode. The full text of the error prompt is: