Reminder to everyone:

You get a free theme, whether you got a physical copy or purchased the game on the eShop. The theme is amazing. If you got it digital, go to your receipt for the game in the eShop and look for the download code. If you got this at a store, physical, find the little paper with Kyogre and Groudon on front and look on the right inside of it. There should be your download code.