I may or may not be getting a 3DS

[Wolf Kanno]

Actually, be careful with DS games cause some games like Zelda:Phantom Ship and The World Ends With You make use of certain features of the DS that didn't quite make it to the 3DS. Basically any feature that requires the player to blow on the screen doesn't seem to work. For TWEWY it just means you can't use certain pins, but there are a couple of puzzles in the Zelda games that do make use of it.