Throwback Galaxy

Throwback Galaxy is a galaxy which is, or features (it is possible that there may be more planets), a redesigned Whomp's Fortress from Super Mario 64, and is confirmed to make an appearance in Super Mario Galaxy 2. The music is also an orchestrated arrangement of the original Super Mario 64 main theme, as the original version was also played on Whomp's Fortress. New enemies were added, such as the Paragoombas, Skeeters and Wigglers. Other enemies seen first in the original game also return like Piranha Plants, Thwomps and Whomps. Some Bob-omb Buddies also appear in the galaxy. A Whomp is found at the top of the area, and defeating it will open an area where the Whomp King is found. A Comet Medal, Rainbow Notes (released from breaking a crate, playing the Super Mario Bros. underground theme) and a bonus planet can be found in the stage too featuring Piranha Plants, which is located in the same place as the Caged Island, along with several Cloud Flowers.

Return of The Whomp King
The first mission here is very reminiscent of the same mission in Super Mario 64 and its DS remake, with a few minor changes. Now, when the player gets to the top, they fight a regular Whomp, and upon its defeat, a hole opens up in the ground, taking the player to a sole platform, where the player fights the now even bigger Whomp King. The ground he will pound is now highlighted red, and the player can walk up his legs. The player should Ground Pound an imprint on his back three times, where he will utter the same dialogue as in the original Super Mario 64, as well as then hitting the ground saying "Darn", turning into a star.