Gunpei Yokoi
, also romanized as Gumpei Yokoi, was a video game designer for Nintendo. He created the Game Boy and produced the Metroid series of video games. He was also a mentor to Shigeru Miyamoto.  Yokoi's last invention, the Virtual Boy, was not a success. He left Nintendo and started a company called Koto Laboratory. His main product idea at this company was the WonderSwan, which came out in 1999, two years after he died.