And what's the problem exactly? It's just emulation - if anything should cause a stir, it should be nintendo for their anti-consumer behaviour
Nintendo: "oh no, how dare you show that your product can do something that's perfectly legal and a very common use"
I think what they sells are more about services that support the game. For example: you can find l4d2 crack easily. But you are never able to join to the official community server list without a proper purchase.
When you are confident in your own products, you don't have to stoop to cheap user-hostile bullying tactics to protect your wares.