Tracks (enemy)

Starbag are enemies that appear in Super Mario Galaxy and Super Mario Galaxy 2. They are turquoise sack-like creatures similar to Moneybags, with legs ending in gray sandal-clad feet and a pair of eyes resembling those of a Blooper. They commonly appear in beaches and other sandy or dirt-filled areas, such as Deep Dark Galaxy or Starshine Beach Galaxy.

The Petapeta is only visible when Mario stands still, and will become invisible and start running away from Mario if he moves. The only indication of the invisible Petapeta's location is the footprints it leaves in the dirt as it flees. If Mario hits an invisible Petapeta with a spin, it becomes visible and remains dizzy for a few seconds. Mario can defeat a Petapeta by tossing a shell or a fireball at it, though the Petapeta can avoid them unless it is stunned; while stunned, he can also jump on it. Petapeta give twenty Star Bits upon defeat. Unlike most enemies, Petapeta are not affected by Star Bits flung at them. Petapeta are incapable of damaging Mario, even if he intentionally walks into one.

In Super Mario Galaxy 2, Petapeta are rare, with only two of them appearing in Starshine Beach Galaxy.