Mario Kart 8 Direct! Get a free game download code with MK8, NA Bundle announced

[ToxicJosh]

You can only register one copy of each game on Club Nintendo. So you'll only be able to receive one code per Club Nintendo account.

However, it does say that the code can be used on any console, so I guess you could set up a 2nd Club Nintendo account (maybe in a relatives name), to register your 2nd copy.