The Star Festival

The Star Festival is the only mission of the Grand Finale Galaxy in Super Mario Galaxy, named after the Star Festival from the same game. This mission can only be done if both Mario and Luigi have obtained 120 Power Stars. The mission's objective is to collect 100 Purple Coins, and this Purple Coin mission does not have a time limit.

Layout
One hundred Purple Coins are scattered around Toad Town and the castle garden. The mission has no obstacles or enemies (though the player can still die by standing in fire or drowning), so the player just needs to simply collect all of the coins. Once they have all been collected, the Power Star will appear in front of the castle.

Trivia

 * In the Super Mario 3D All-Stars version of Super Mario Galaxy, when the player talks to Mailtoad, he now has different dialogue. The "Yes" and "No" prompts are removed and the two images obtained from him are automatically sent to the Nintendo Switch album if the player talks to him. Additionally, the message from the Super Mario Galaxy staff that was originally sent to the Wii Message Board is now read out by the Mailtoad in-game.