Rules of Engagement

Rules Of Engagement is the twenty-eighth episode of Ben 10: Omniverse.

Major Events

 * Julie Yamamoto, Ship, and Sandra Tennyson make their Omniverse debuts.
 * Hervé makes his debut.
 * Ben and Julie are now broken up.

Debuts

 * Hervé (first-appearance)

Characters

 * Ben Tennyson
 * Rook Blonko
 * Julie Yamamoto
 * Ship
 * Ester
 * Kraaho
 * Sandra Tennyson
 * Hervé (debut)

Villains

 * Princess Looma
 * Fistina

Aliens Used

 * XLR8
 * Bloxx
 * Armodrillo
 * Humungousaur
 * Jury Rigg
 * Ball Weevil

Errors

 * Right before Ben transformed into Ball Weevil, he was still wearing his Tenn-Speed gear. After he transformed back to normal, he wasn't wearing his gear anymore.
 * During the second fight scene with Looma Red Wind, Rook didn't have his Proto-Tool with him. Right as Ben and Fistina pulled up to his house on the Tenn-Speed, Rook had the Proto-Tool with him.

Trivia

 * It is revealed in this episode that Fistina has a crush on Rook.
 * It is in this episode that Ben gets his Tenn-Speed motorcycle.
 * It is shown that Ben builds it himself as Jury Rigg using parts of Rook's blown up Proto-TRUK
 * When Ben is flashing back to his unintentional break-up with Julie, he can be seen battling against a Sumo Slammers player with the screen-name of "Derrick W."
 * Ester mistook Julie and Hervé for Gwen and Kevin.