Nintendo of America has confirmed a promotion being run by Best Buy (in the U.S. only), where a purchase of Donkey Kong Country Returns 3D comes with a free download code for Super Mario Bros.: The Lost Levels on the 3DS eShop. The retro Mario platformer has a price tag of $4.99, so it's a decent incentive.
Rather bizarrely, and despite the official advertisement, Best Buy's website is still listing the physical version of the game for pre-order — we'd hope the bricks-and-mortar stores have their stock by now — while the equivalent download code is the same price and without the free Virtual Console download. If you're planning to pick up this terrific Wii re-make and fancy some free retro goodness, we suggest popping down to your local store while the free code stock lasts.
Are any of you planning to take up this offer, or have you already done so?