Nintendo is a company that tries to expand its market keeping an essence. During the 2000 era, the big N experimented to reach the phone market with a device with capability to run videogames.
There were some rumors published in that years that claimed that Nintendo was developing this type of hardware. I remember to read some news about that topic, but in the end, Nintendo oriented its market in another direction.
Those rumors were right and Nintendo patented a gaming cell phone in 2010. This device had a phone CPU and a game CPU. Apparently, the device was able to run Game Boy games and maybe, titles created specifically for that hardware. The system had a play key to play a game and an interruption key to interrupt the game executed. The technology was far away from the phone tech that we have today, but was interesting.
Please, visit the patent to expand this information (more pictures, info,…). Click here.