Would it be legal to mod a Nintendo Dsi?

Would it be legal to mod a Nintendo Dsi?

Yes of course, why shouldn't it be like that

And roams too? I read something about it

Roms not

Yes, modding your system is completely legal. However, downloading ROMs from the Internet is not. BUT if you create the roms yourself - that is, copy them from your legitimately acquired cartridge - this is legal.

Thanks for answering my questions about Nintendo so well.

By the way, do you know how I would do it if I added the Roams to the Nintendo "apps"?

Unfortunately no, I only have experience with the 3DS, not with the DSi.

Anyway, thank you, I wish you a good morning