Prankster Comet

Prankster Comets are Comets that appear in Super Mario Galaxy. They will appear from time to time in the orbits of various galaxies. If the player travels to a galaxy when a Prankster Comet is in orbit, a special event will be triggered, which will usually change the gameplay of the level. By completing the event, the player will receive a Power Star.

Prankster Comets

 * Speedy Comet: Mario must complete the level within a certain time limit.
 * Daredevil Comet: Mario must complete the level with only one health.
 * Cosmic Comet: Mario must race Cosmic Mario to a star.
 * Fast Foe Comet: All enemies in the level are sped up.
 * Purple Comet: These are only available after the game is beaten. Mario must collect one-hundred purple coins to get a star.