The Barillian Bug is a scorpion-themed alien used by Darkonda. Barillian bugs once attacked KO-35 turning whoever it stung into monsters. A bug infected Carlos and he was slowly turning into a scorpion-like monster. T.J. and Andros went after an antidote on KO-35. Cassie was infected as well and T.J. reversed the effects on the two by spraying them with an antidote gun. Darkonda released a bug that became a monster similar to what Carlos and Cassie became and was destroyed by the Astro Megazord.