To participate in the promotion, you have to be a resident of the United Kingdom, Ireland, Germany, Austria, France, Spain, Italy, Belgium, the Netherlands, Portugal, Switzerland, South Africa, Australia, or Russia.
1) Register a Nintendo 3DS or Nintendo 3DS XL system and one of 15 eligible games at club.nintendo.com.au between 28th November 2013 (2:01am AEDT) and 14th January 2014 (9:59am AEDT).
Eligible games:
Mario & Luigi: Dream Team Bros.
Animal Crossing: New Leaf
The Legend of Zelda: A Link Between Worlds (launching 23rd November)
Donkey Kong Country Returns 3D
Fire Emblem: Awakening
Luigi's Mansion 2
LEGO CITY® Undercover: The Chase Begins
Sonic Lost World (Nintendo 3DS version)
Monster Hunter 3 Ultimate (Nintendo 3DS version)
Pokémon X
Pokémon Y
Bravely Default (launching 7th December)
New Super Mario Bros. 2
Mario Kart 7
Professor Layton and the Azran Legacy
2) Log in to Club Nintendo 24 hours later and check the promotional banners for your free download code. The deadline for claiming the download code is 9:59am (AEDT) on 14th February 2014.
3) Use your download code in Nintendo eShop before 9:59am (AEDT) on 14th March 2014 to download SUPER MARIO 3D LAND for free!
I just registered Pokemon and Professor Layton on the weekend :(