There's actually a fan made sequel to Super Mario 64 with entirely new maps and stars circling the internet. It's only playable through an emulator though, so I'm not allowed to post any link to it.

Haha, glad I'm not the only one enjoying it :P

To embed you simply click the share button below the video, then press embed and choose which size you want the window to be. Make sure you check each box and then copy and paste the code that appears inside the big box in any forum

Why not ? It's basically just a stand alone mod. Emulators aren't illegal either.

"Do not post links to or requests for warez. This is pretty well black and white - posting links to, or requests for, warez can and will get you banned posthaste. When we say warez, here is what we mean: copies of games, ROMs of console games (not including wholly from scratch creations, subject to any licenses said creations may have), leaked versions of not-yet-released games, even ones that will be freely available in the future. Just because you've got your hot little digital hands on a copy of the Duke Nukem Forever open beta a few years early, doesn't mean that you can share it here."

Looks like you're right about the Mario sequel, but other than that there seems to be zero tolerance towards ROM links.

"not including wholly from scratch creations"

Well that's probably the most important statement. I'm not 100% sure, but as long as that ROM isn't meant to be distributed for money by someone who doesn't own the rights it wouldn't be illegal.
Still, haven't you seen topics on Super Mario Bros. flash games ? You can still buy that game via Virtual Console as far as I know, making that case even more dubious.

However, providing links is not necessary. Shouldn't be too hard to find something like that. Just saying that I don't think anyone would get a problem with that.

Probably not those systems, no. Although it's worth noting that older systems routinely get new releases. New Atari 2600 games are regularly released to this day, for example, and that's common enough to not be newsworthy outside of Atari-dedicated forums.

Did you post this from The Onion News Network, Ryan?

I always wondered if a company could actually do this beyond like the homebrew communities that still make unofficial 2600 and NES carts and such. Is this legal of them to do? Like do they need Nintendo's approval to do this, or it's at the point where pretty much anyone can put out a game on a defunct system as long as they have the means of manufacturing it?

I HATE that with non hd games >.>

Well this is frustrating. I know, based on lawsuits between Atari and Activision, that it's perfectly legal. Unfortunately, I can't find any primary sources on those lawsuits, so I can't explain why it's legal.