The colbalt star was a star with Blue and turquise colors. The blue star was made out of an unknown type of shining blue crystal. The purpose of this star was to serve as the power source for Professor E. Gadd's Time machine. It could be, and was, broken into six shards by Princess Peach. After a duel between Peach and Elder Princess Shroob, it became a makeshift prison for the Elder Princess of the Shroobs.