Starshroom

Starshrooms are mushroom-shaped starships found in Super Mario Galaxy. After Mario or Luigi rescue the Toad Brigade in the Honeyhive Galaxy, the Toads relocate their base of operations to the Garage of the Comet Observatory and start building the red Starshroom with the help of the Lumas. Starshrooms appear to resemble Rosalina's ship, and were presumably modelled after it.

Once Mario recovers seven Power Stars, the red Starshroom will be fully constructed, and can later be seen exploring many different galaxies, including the Space Junk Galaxy, the Ghostly Galaxy and the Sweet Sweet Galaxy. Even a sunken Starshroom can be found, on the sea floor of the Drip Drop Galaxy. The Starshrooms usually act as platforms, and the Toads are rarely seen actually inside one of them.

At first, there only appears to be a single, red Starshroom. However, as the game progresses, four additional Starshrooms, all color-coded for the rest of the Toad Brigade can be seen at certain points, such as during the Purple Coin challenge in the Sea Slide Galaxy. Only "the Starshroom" is mentioned by the Toads, however.