Grand Finale Galaxy

The Grand Finale Galaxy is a galaxy in the video game Super Mario Galaxy. It is literally the last galaxy of the game, but it is also seen at the very beginning of the game. It is unlocked when the player collects 120 power stars then defeats Bowser. A Green Luma will transform into a Launch Star to launch Mario to the Grand Finale Galaxy on the Comet Observatory.

Power Stars
The only power star on the galaxy is where the player must collect purple coins in the galaxy. After beating it, the player will receive a message on the Wii Message Board congratulating them on beating the game.