You can't legally download Nintendo Gameboy ROMs online for free unless Nintendo specifically gives permission. It is considered illegal but rarely will any action be taken against you.
No. They state in no uncertain terms that ROMs are illegal and that both ROMs and emulators are damaging to the console industry. See the related links section for the official Nintendo legal information page.
No, but it is illegal to download ROMs, BIOS files or any unauthorized copies of DS games.
The project 64 is a Nintendo 64 emulator that lets you play Nintendo 64 games that you download from websites.
No
Downloading ROMs for games that you do not own is considered illegal. Legal options include creating your own ROMs from games you own or getting ROMs from legal sources.
Yes it is legal, but the things you can do are illegal such as running "roms" on the R4 is illegal and downloading the roms for free are too.
hacking is illegal, but if you need to play homebrew and downloaded game roms on your ds purchase an R4 or an M3 hack card you can buy on eBay
On 1 gigabyte of memory it is possible to store 100's of "retro" roms of the SNES/NES years seeing as they are all very small files. You will need an emulator to play these roms however which takes significantly more memory, watch out though, playing these games without owning the original copy is illegal.
Not yet, but emulating roms that aren't your own is illegal.
yes
Some examples of Super Nintendo roms include Final Fantasy IV as well as Tekken 2. These can be purchased at many sites as well as Amazon and Gamestop.
Yes, all ROMs are illegal