The Omnitrix begins to malfunction and goes haywire when Psychobos steals a piece of an Omnitrix core causing Rook to mutate into a half-Gourmand and a half-Revonnahgander after Ben 10 attempts to complete a transformation.

Gwen and Kevin visit Bellwood. Kevin tells Ben that he must hide himself from The Tetramand Princess Looma as she is hunting him as Looma wishes to marry Kevin.

Magister Patelliday is kidnapped by pirates who rob ships and put them in giant glass bottles to sell them. They intend to devour Patelliday. Any attempts at rescue are hard, since they have a Krakken and a robot army.

Ben and Rook must stop Trumbipulor from gaining absolute power while Blukic and Driba set out to find Mr. Smoothy's.

Ben and Rook are attacked by Khyber at a festival.

Billy Billions turns Ben and Rook into kids again.

Ben and Rook visit Rook's family while Revohnnah is attacked by an old foe.

When Eon forces young Ben and teenage Ben to switch minds, only the time-traveling Professor Paradox can sort things out and help Ben stop Eon from taking over the timelines.

As payment for destroying his car, Mr. Baumann orders Ben to make deliveries for him without using the Omnitrix.