Spikeballs is a large muscular creature with bluish-gray skin and large spiked maces for hands. He wears a black spiked mask that covers most of his face and black suspenders. Spikeballs also has red eyes with black pupils.
In "Storm the Castle", Spikeballs is among the monsters who fight Star when she comes to Castle Avarius to save Marco. After Star's attack fails to free Marco from his crystal prison, Spikeballs grabs her, but is ordered to release her by Toffee. He, along with all the other monsters, is caught in the explosion when Star's wand is destroyed.
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