Wikipedia
R.O.B. (Robotic Operating Buddy), released in Japan as the , is an accessory for the Nintendo Entertainment System (NES). It was launched in July 1985 in Japan, and October 1985 in North America. It had a short lifespan, with support for only two games which comprise the "Robot Series": Gyromite and Stack-Up. R.O.B. was released with the intention of portraying the Nintendo Entertainment System as a novel toy in order to alleviate retail fears following the North American video game crash of 1983. R.O.B. is available in the Deluxe Set, a configuration for the console that includes, among other things, R.O.B. and Gyromite. Stack-Up is packaged separately and includes its own physical game pieces.
In addition to its status as a peripheral, R.O.B. has appeared in various video games, either in cameos or as a playable character.