Deep Dark Galaxy

Deep Dark Galaxy is a ghost-type galaxy in Super Mario Galaxy, like the Boo's Boneyard Galaxy and the Ghostly Galaxy. However, the main planet in it has a beach with many Toads and crab-like enemies. There are also Magikoopas near it. The thing that makes it "spooky" is that there is an underwater cavern (it's rather dark, giving the Galaxy its name) filled with "ghost ships". There are very few planets aside from the big, main one. This is also the second appearance of Guppy.

Ghost Ship Daredevil Run
This is a semi-difficult challenge. Mario starts in the scene where he lands in front of the ghost ship that is surrounded by Boos. The player will have to go on the ghost ship to fight Kamella. The trick is to successfully defeat the clever witch with only one health point. Every now and then Kamella throws a green shell at Mario, which he must use to attack her. The best way to defeat Kamella is to take out the Magikoopas and wait for her to throw a shell at Mario. Once Kamella is defeated, the player gets a Power Star.