Things are kind of low key in this week's Nintendo Download, as there's a ton of old releases and some extremely dull new ones.
On the 3DS, you can grab Wario Land 2, escapeVektor, New Super Mario Bros. 2 DLC, Mario Tennis Open, Pilotwings Resort, Pokemon Rumble Blast, 3D Game Collection, BIT. TRIP SAGA, PIX3D, and Riding Stables 3D. There's also a demo for 2 Fast 4 Gnomz if you're interested in fast things and extreme gnomes.
On the DSiWare side of things, there's Anonymous Notes Chapter 3 - From the Abyss, Cake Ninja: XMAS, and Castle Conqueror - Heroes 2. The Wii Shop is also getting an odd update after being stagnant for weeks, with Vampire Crystals (with demo).
Although they're not new, Trine 2 ($15.99 'til January 7), Little Inferno ($9.99 'til January 4), and Chasing Aurora ($7.49 'til January 3) are now on sale.