About This File
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crystaltile2 is an all-purpose DS editing tool. I admittedly don't really know the extent of what it's capable of but it has a very convenient way of importing and exporting NARC files into the ROM by clicking the little DS looking icon near the top. There are other ways to pull NARCs in and out but this is one of the most convenient. It was made by Chinese developers, hence why a large amount of the tool isn't written in English.