With the exception of Fantasy Life, save files for cartridge games are on the cartridge itself, so you would not get an extra set of save files on a different system. You would be able to get an extra set of save files by downloading the digital version of the game. There is also a free app on the 3DS eShop that allows you to move save data from a cartridge to a digital version.
Do you mean that it’s a new game that you want to add to the site, or it’s a category you want to add to an existing leaderboard?
"Official Switch NSO releases are allowed."
https://www.speedrun.com/sm64?h=120_Star-VC&rules=category&x=wkpoo02r-e8m7em86.jq6540ol
That I’m not sure about, as I’ve never tried it. I think you might be able to get answers if you join one of the Wii U Facebook groups and ask there.
I know buying a second disc wouldn’t give more save files, because the console would consider the two discs to be identical. (Note that no data is burned from the Wii U onto the disc)
Welcome to the site! Feel free to make a post in the Streaming/Recording/Equipment subforum if you have any further questions about recording your runs.
There is already a leaderboard for that game. If you want a new category, ask for it to be added to the existing board.
What is it specifically? A new game would usually go through the support hub, whereas a new category for an existing game would need to be added by the game’s moderators.
Yes, you can take a break. No, you can’t pause time during the break unless the category rules specifically allow for that.
Ask in the Minecraft forum or discord. Or check the guides.
Welcome to the site. Here is the leaderboard for Farming Simulator 22. You can make a post in the game’s forum or message a mod if you want another category added.