Super Mario 3D Land, Professor Layton and the Miracle Mask or one of three other titles available for free to 3DS XL owners.
Available in the UK on November 16 and November 30.
Ninty's 3DS greats now available to download from European eStore.
Nintendo boss Satoru Iwata has talked openly about potentially bringing paid DLC to its titles, using Super Mario 3D Land and Wii Fit Plus as examples.
news : Mario is coming to town
The Westfield Stratford centre will be transformed into Mario Land this February in a sampling event which Nintendo is calling - Mario is coming to town: Half-Term Heroes.
The Nintendo 3DS sold more units during its first nine months on sale in the US than the Wii managed during its first nine months, Nintendo has said.
article : Presents for Video Game characters
What you should buy for Mario, Drake and co?
1.7 million Xbox 360s is almost double the figure achieved by Wii and PlayStation 3.
news : 3DS selling out at UK stores
UK retailers are reporting a dramatic increase in 3DS sales in the run up to Christmas, reports MCV.
Call of Duty: Modern Warfare 3 makes it four weeks at the top of the All Formats All Prices UK video game chart, recording its first sales increase week-on-week since launch.
Nintendo experimented with displaying the planet-hopping game on a small screen - Mario was a speck.