Tools and utilities that can read, extract and modify Nintendo DS ROM files on your home computer. Patching software for patching formats commonly used in DS ROM hacks are also available here.
Game/series specific ROM hacking tools, save editors, game specific cheat code creation can be found here too, more general tools (that are not unpacking tools) are in the development section.
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi