Rasticore is a very tall (standing almost twice Star and Marco's size) and muscular Septarian (humanoid lizard creature) with green skin, a yellow right eye with a black slit pupil, and a frilled neck. He has a purple gemstone for a left eye, an artificial cybernetic left arm, and spikes jutting out from his shoulders.
Rasticore wears dark grayish-blue pants, a brown belt, black boots, and a purple cloak that usually covers his right arm.
In "Gift of the Card", Rasticore is hired by Miss Heinous to track down Star Butterfly and Marco Diaz after their actions resulted in her being removed from her position as headmistress of St. Olga's Reform School for Wayward Princesses. Using his tracker, keyed to Marco's DNA, and dimensional chainsaw (which he constantly has trouble starting), Rasticore tracks Star and Marco to Earth.
Upon arriving at the Diaz Household, Rasticore asks Janna where Star and Marco are, and she tells him they went to Quest Buy. After some more trouble starting his chainsaw, Rasticore leaves again. When he arrives at Quest Buy, he blasts one of the sloth employees with a laser from his cybernetic arm.
When Rasticore locates Star and Marco, he prepares to destroy Star and deliver Marco to Miss Heinous. However, before he can do so, he is disintegrated by Marco's Quest Buy gift card, leaving only his right hand behind. At the end of the episode, Rasticore's dismembered hand is delivered back to Miss Heinous.
In "Heinous", Rasticore is revealed to be slowly regrowing his body. Miss Heinous carries his regenerating arm throughout the episode and treats it in an overly affectionate manner. She attempts to have the arm attack Marco at one point, but it can do nothing but slowly crawl toward its target.
- Theme Song (season 2)
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- According to Star and Marco's Guide to Mastering Every Dimension, Rasticore is a lizard-like creature called a Septarian. Toffee belongs to the same species.