Backward compatibility is always appreciated, there's no doubt about it. However, sometimes a console's implementation can be lacklustre, either due to technical difficulties or laziness on the manufacturer's part. Depending on who you ask, the 3DS' DS/DSi mode can be said to fit in either: your only options are to either play games upscaled to the 3DS' screen resolution, which includes a blurry filter that cannot be turned off, or in native res mode, which is hardly...
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Source: https://gbatemp.net/threads/twpatch-let ... ds.543291/