[quote name='crunchewy']How is that different then running a rom in emulation? I mean, if you own the game why can't you run the rom on an RF, M3DSS, etc, whether in an emu or not an emu? For the record, I have an M3DSS and use it to run homebrew and to run roms of NDS games THAT I OWN. In fact, I'm ripping my own carts for the roms. Morally I definitely think I'm in the right. Legally? I certainly ought to be in the right there too. And, IMHO, the DS is oh so much better when you can easily carry all your games with you inside one cartridge instead of carting around a DS and 20 cartridges and all that swapping. It's also a lot harder to lose a DS with a cart in it, then to lose one of many loose cartridges.[/quote]Legally you own the cart and can play the cart on your DS. But that is different from having the right to play the game off a ripped rom of a game you own. If the terms of use don't include that right (which they don't), then you don't have the right to do it (yes, even though you own the game). So legally speaking, no, that's not your right even though you own the game. Morally speaking, I tend to think illegal activities are not moral activities.
Now, whether anyone cares if you play a ROM if you own the game is a different story. You can make a strong case that Nintendo should not care based on good business sense, but that is a separate realm from the legal discussion.