TYPE: Alien, Monster.
AFFILIATIONS: Koopa Troop.
CLOSE RELATIVES: None.
SKILLS AND ATTACKS: They can turn invisible.
STRENGTHS: They are quite fast when moving.
WEAKNESSES: When invisible, they leave behind footprints.
Starbags are like Moneybags, but they look more like actual bags rather than a clam-shaped creature. They have loads of star bits inside of them, so they are preyed on by other creatures.
In order to survive, Starbags can turn invisible and run away. Unfortunately for the monster, its footprints can be seen, allowing intelligent predators to spot them.