Game & Watch was a very popular batch of portable video games that each had one game assigned to it. One very popular game was Ball, the one where Mr. Game & Watch had to juggle balls and if all of them dropped, it was game over. In fact, Mr. Game & Watch was so popular, he starred as a secret character in Super Smash Bros. Melee & Brawl! The octopus above is his Final Smash, by the way!
(Below) Mr. Game and Watch in SSBB (Super Smash Bros. Brawl)
(Below-Left) Mr. Game and Watch in debut game Ball (1981)
(Below-Left) Mr. Game and Watch in debut game Ball (1981)