In Pokémon, you are an 11-year old boy that becomes a pokémon trainer. Pokémon are creatures that you collect and train. When they are trained well, they become more powerful and even evolve. Pokémon is the best selling Game Boy game and one of the best selling games of all time. This game was developed by Nintendo and Game Freak and published by Nintendo. 
The peaceful Mushroom Kingdom has been invaded by the Koopas; a tribe of turtles that use black magic. The people of the Mushroom Kingdom have been turned into stones, bricks and even field horsehair plants! The Mushroom Kingdom has fallen into ruin! The only one that can undo the black magic of the Koopas is Princess Toadstool, daughter of the Mushroom King. Unfortunately, she is has been captured by the Koopa King, Bowser. Mario, a plumber, hears about the Mushroom people's plight and sets out on a quest to rescue Princess Toadstool, restore order to the Mushroom Kingdom and defeat the evil Bowser.
After the hugely successful SNES classic Donkey Kong Country, Nintendo decided that the GameBoy needed to have a Donkey Kong Country games of its own, thus the Donkey Kong Land series was born. Three Donkey Kong Land games were made, each one relating to their SNES counter parts. Donkey Kong Land has the exact same story as Donkey Kong Country.
Ms Pac-Man was a sequel to the monster hit Pac-Man. It is well loved game was available in both cocktail and upright versions. With a simple game play of moving around a maze collecting dots while avoiding the badies; Ms Pac-Man became the love of many.
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The most well known portable gaming device in the world is Nintendo's Gameboy (GB). Originally released in the late 80's it has sold more than anything in the world. Several years later Nintendo released the "color" version of the all time classic! Specifications: Z80 Sharp 8 MHz Processor. 32K Memory. 160x144 Display Resolution x 56 colors. FM sound quality. 8-directional D-Pad Control, A, B, select, and Start buttons. 10+ hours on 2 AA batteries.
Pokemon Yellow
Super Mario Bros. Deluxe
Donkey Kong Land
Ms. Pac-Man