Grand Finale Galaxy

The Grand Finale Galaxy is the final galaxy (obviously) in Super Mario Galaxy. The galaxy is unlocked after getting all 120 stars and unlocking Luigi (it is unknown if you must get the stars as Luigi). This galaxy has the 121st Power Star. The galaxy is Toad Town from the beginning of the game. The only difference is that creatures from other parts of the game are there. There are Penguins, robots, and even a mushroom-shaped space ship.

Levels

 * The Star Festival