World S: Here We Go!, also known as Special World, is the seventh and last world featured in Super Mario Galaxy 2. It is located high in the sky of an unknown planet with colorful star-shaped islands, and has two rainbows in the background. This world is shaped like an "S", hinting at its name, and has no forked directions. It holds a total of seven galaxies, the last of which, the Grandmaster Galaxy, can only be accessed by collecting all 120 Power Stars as well as all 120 Green Stars. It is unlocked after the player defeats Bowser for the first time. This world's appearance is hinted at by a Bob-omb Buddy brought back from the Throwback Galaxy, who asks about the "strange, legendary world" in a manner similar to Lubba's.
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