Many people over the years have tried to figure out exactly why Nintendo doesn't have a lot of third party support. Is it that their traditional crowd isn't interested in third party games? Is it the hardware? Is it the online system? Is it the way Nintendo treats outsiders? There really isn't one singular answer to the the why, just like their isn't one way to solve it. However, apparently a credited Japanese Analyst thinks he sorted it all out: Nintendo can't get support because of Sony.
In the corporate management policy briefing on January 30th the company is going to describe the future business policy:
1: Dealing with content development risks due to the consecutive failure to launch with high performance the 3DS and the Wii U.
2: Response to the problem of the inability to secure third party titles caused by SCE [Sony Computer Entertainment] investing heavily in the marketing cost of multiplatform software.
3: Due to the soaring development costs of home consoles making difficult to ensure profitability, we hope to hear an answer on the building of a new business model.
Of course, there is truth to this. Sony does invest heavily into third party marketing and even grabs some exclusive DLC and content (The Witness, Journey, etc). Microsoft does the exact same thing, but since Microsoft isn't a big deal in Japan I can forgive the analyst for overlooking them. However, is this the real reason Nintendo isn't getting support?
Source: Ace Securities