Thank you for the tutorial
I want to ask how big the produced files (RomFS folder and .bin data) is? I have the default SD Card that came with the 2DS, on the label it's 4GB, but in fact it has 3.7GB and I don't really want to buy an extra SD Card. Currently I have 0.8GB of free space, but if required I can delete some things that it has like 2.5GB of free space.
I also want to know if this tutorial works for dumping Super Mario 3D Land and any other game?
Sorry for the late reply, the dumped files are around 300MB, but if you're just replacing levels and tilesets, that size will be much lower.
The tutorial was created with NSMB2 in mind, but the dumping section should theoretically work with any 3DS game, as long as you use a different TitleID.