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An old rival of Ben Tennyson named Billy Billions turns Ben and Rook into kids again while bringing Dimension 12 robots to Earth and controlling them.
Ben and Rook are attacked by Khyber and his dog (which can now transform at will without Khyber's whistling) at the Old Bellwood Days Festival. In a flashback, it is also revealed how Malware had obtained his current mutated Galvanic Mechamorph form.
Ben and Rook visit Rook's family on Revonnah during the Amber Ogia harvest. Meanwhile, Fistrick trains the planet's local rodents called the Muroids to steal the Amber Ogia as fuel for the planet-destroying satellite in his possession.