Nintendo released the Color TV Game 6 in 1977. It came ready to play six brightly colored variations of Pong, but the simple "light tennis" games are a world away from the fanciful universe of Mario and friends that would lead the company to dominate the industry in the late 1990s.
Nintendo got its start in the 1890s as a playing card manufacturer. By the early 1970s, they were a struggling toy company fighting to find their niche. The emergence of early video games caused great excitement and the company became the Japanese distributor of the Magnavox Odyssey game console in 1975. They wasted no time joining forces with electronics giant Mitsubishi to develop their own microprocessor-based Pong derivative, much like the company's modern relationships with IBM and ATI.
The Color TV Game 6 was aimed at the domestic Japanese market, most likely because they were afraid of copyright lawsuits from Coleco, Atari and Magnavox if they attempted to market the device in the USA. It made a lot of sense for the company to leverage its existing sales network in Japan and Nintendo quickly sold more than a million of these futuristic devices.
Their 1978 followup console, the Color TV Game 15, improved on the original design by featuring external controllers and more games. These bright red consoles also sold more than a million units, paving the way for even more ambitious video-based projects such as their famed 1983 Famicom system.
Nintendo Color TV Game 6 [old-computers.com]
related:
1975: Atari Pong Invades the Family Room
Videogames: In the Beginning
Build your own Pong game