Nintendo

Nintendo is currently a publishing company that publishes many series' including the Super Mario series, The Legend of Zelda series, and the Metroid series and manufactures consoles such as the Wii. Their mascot is none other than Sonic's rival, Mario.

Console Wars
Nintendo and Sega's rivalry ignited with the fourth console war, where the Nintendo Entertainment System (or NES for short) was competing against the Sega Master System. Nintendo and Sega's rivalry expanded to to four different wars, ending Nintendo and Sega were certainly not alone. During these wars, there were other systems. These include:
 * NES v. Master System
 * SNES v. Sega Genesis
 * Nintendo 64 v. Sega Saturn
 * Nintendo GameCube v. Sega Dreamcast
 * TurboGrafx-16 (16-bit;fourth generation)
 * Playstation (32-bit;fifth generation)
 * XBox (sixth generation)
 * Playstation 2 (sixth generation)

Final War
During the sixth generation, the Dreamcast did so poorly, that it lost to the the PS2 and never competed against the XBox. The Dreamcast was then discontinued.

Third-party company
Sega's next move was announcing that they would not be making consoles anymore, and become a third party company. Since then, Sega has worked with Nintendo to create many Sonic games on Nintendo systems, including Sonic Advance for the Game Boy Advance, and Sonic and the Secret Rings for the Wii.

Crossovers
Sega and Nintendo started working to create crossover games between their mascots, Mario and Sonic. The first game was Mario & Sonic at the Olympic Games which featured Mario, Luigi, Peach, Daisy, Bowser, Wario, Waluigi, and Yoshi for Team Mario, and Sonic, Tails, Knuckles, Amy, Blaze, Shadow, Vector, and Dr. Eggman for Team Sonic. The popular release caused the recent demand for Sonic to be in Super Smash Bros. Brawl to grow, and later on, he was confirmed to be in SSBB. One year later, Sega released Mario and Sonic at the Olympic Winter Games which included all the previous characters, with the addition of two new characters for each team: Bowser Jr. and Donkey Kong for Team Mario, and Metal Sonic, and Silver.

Home

 * Color TV Game
 * Nintendo Entertainment System
 * Super Nintendo Entertainment System
 * Virtual Boy
 * Nintendo 64
 * Nintendo GameCube
 * Nintendo Wii

Handheld

 * Game & Watch
 * Game Boy
 * Game Boy Play-It-Loud!
 * Game Boy Pocket
 * Game Boy Light
 * Game Boy Color
 * Game Boy Advance/Game Boy Advance SP
 * Nintendo DS/DS Lite/DSi/DSi XL/3DS

Trivia

 * Nintendo has a magazine called Nintendo Power, which revealed Sonic and the Black Knight as well as Sonic Colors.
 * Sonic Colors was also revealed at Nintendo's E3 presentation.