DS Lazy is a tool that allows you to perform many functions on a DS ROM. Its user-friendliness as well as DS ROM unpacking and packing capability makes it a popular and essential program to use for DS ROM hacking.
Features of DS Lazy
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trimmer
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The trimmer will trim a DS ROM by removing unnecessary bytes of data from a DS ROM. It is purely to save disk space.
ndsloader
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This is for prepending a small ndsloader.
crashme
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This scans for crashme code in a ROM.
ndspatch
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This patches a file with ]{ain's “ndspatcher” so that you can load and use an NDS ROM with a GBA Flash Cart device.
nds unpack
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Unpacks a DS ROM to the NDS_UNPACK folder.
nds packer
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Creates a DS ROM from the data in the NDS_UNPACK folder. After packing, it will prompt you for a file name to save the packed ROM as.