Purple Comet

The Purple Comet is a Prankster Comet in Super Mario Galaxy. The comet only appears after the Player has beaten the game. If the comet appears, the Player will need to collect 100 Purple Coins, to get a star.

These are the hardest Prankster Comets in the game and a few missions are timed, but most of the timed missions has 150 Coins instead of 100, but 100 is needed for the star.