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 
Edit
trimmer Edit
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 Edit
This is for prepending a small ndsloader.
crashme Edit
This scans for crashme code in a ROM.
ndspatch Edit
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 Edit
Unpacks a DS ROM to the NDS_UNPACK folder.
nds packer Edit
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.
