Homebrew Misc Others Curious about the R4i Save Dongle

[LunarPurin]

So, I came across an interesting piece of hardware, a USB stick with a DS cartridge slot in the side of it.

It appears to mostly be intended for save file manipulation, copying, writing etc.
But could this in theory be used to overwrite N-Cards, or do something else with them?

I'm really curious if they have any more potential besides save file writing/dumping, especially since I have projects in mind that require N-Cards, but the GBA cart required for them appears to be hard to find nowadays.

 

[LunarPurin]

I dunno if I mislabelled this or something, or if it was a dumb question ^^;