OneTime on 21 October 2017
From a practical perspective:
Nintendo probably don't really care as long as you have bought a copy of the game. They have plenty of people who download without paying for it at all to go after.
From a legal perspective:
You have bought a piece of plastic and a license (obviously you don't own the copyright). The license is that massive document that you "agree to" when you play the game. It defines exactly what you can do, and almost certainly will not allow running on non-certified hardware.
Making a copy of the game (e.g. loading it into your PC's RAM, or displaying pictures of it on the screen), is therefore not covered by the license that you have bought, and so technically copyright infringement.
