Grand Finale Galaxy

The Grand Finale Galaxy is the final galaxy in Super Mario Galaxy. The galaxy is unlocked after all 120 stars are obtained with Luigi. This galaxy has the 121st Power Star for Luigi. The galaxy is Toad Town (also known as the Castle Gardens) from the beginning of the game. The only difference is that creatures from other parts of the game are there, including Penguins, Bees and Gearmos, the three major NPC types in the game. The Toad Brigade and their ship, the Starshroom, are found outside of the castle. After collecting all the Purple Coins, the Mailtoad will recieve a message. If you talk to him, he will send a congratulatory picture to the Wii message board. This picture differs depending on whether you spoke to the Mailtoad with Mario or Luigi. The picture can also be sent to friends.

The Grand Finale Galaxy is reached by talking to the fourth Green Luma on the Trial Planet.

Interestingly, on the list of galaxies, it is simply called "Grand Finale", lacking the "Galaxy" name that all other galaxies use. This is likely because it is merely Toad Town and Princess Peach's Castle rather than a proper galaxy.

The Star Festival
The Star Festival is the only level of the Grand Finale Galaxy in Super Mario Galaxy. The mission requires the player to collect all one-hundred Purple Coins. After getting them the player recieves the 121st Power Star. However, before collecting the star, the player may talk to the Mailtoad to receive a congratulatory message and attached picture, which is sent to the Wii Message Board. It is named after the event at the beginning of the game, which occurs every 100 years.