Action strategy and RPG title Squids Odyssey can be purchased on 3DS and for those that do, they can also download a free copy of the title for the Wii U (provided both system IDs are linked).
Journalist Daan Koopman first tweeted about the deal earlier this morning:
If you buy Squids Odyssey on Nintendo 3DS, you will be getting the Wii U version for free. Euro downloads just confirmed this.
— Daan Koopman (@NintenDaan) June 30, 2014
The information can also be found on the Nintendo Europe official website:
Free download of Squids Odyssey on Wii U if you’ve downloaded Squids Odyssey on a Nintendo 3DS that is linked to the same Nintendo Network ID that you have registered on Wii U.
Nintendo has already set up various infrastructures to support cross-buy in future titles, such as linking Nintendo IDs and eShop balances between 3DS and Wii U, and Pushmo World recently had a special promotion where you could receive 30% off the Wii U version if you previously bought a 3DS game. Hopefully this might mean more cross-buy support in future titles.