World S

World 7 : Here We Go, also known as Special World, is the seventh world featured in Super Mario Galaxy 2. It is located in the sky of an unknown planet with star-shaped continents. It holds seven galaxies the last of which, Grandmaster Galaxy, can only be accessed by taking all the 120 Power Stars and the 120 Green Stars. Almost all the galaxies here are references to other Mario games. The placements of the seven galaxies for an S, hinting at the name of the World.

Galaxies

 * Mario Squared Galaxy
 * Rolling Coaster Galaxy
 * Twisty Trials Galaxy
 * Stone Cyclone Galaxy
 * Boss Blitz Galaxy
 * Flip-Out Galaxy
 * Grandmaster Galaxy