Rules of Engagement

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

Plot
Princess Looma comes to earth, seeking four things for her and Ben's wedding.

Major Events

 * Julie Yamamoto, Ship, and Sandra Tennyson make their Omniverse debuts.
 * Hervé makes his debut.
 * Ben and Julie are now officially broken up, but they are still friends.
 * Princess Looma is no longer Ben's fiancé.
 * Ben builds his Tenn-Speed Cycle from Rook's Proto-TRUK.

Debuts

 * Hervé (first-appearance)

Omniverse Debuts

 * Julie Yamamoto
 * Ship
 * Sandra Tennyson

Characters

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

Villains

 * Princess Looma

Neutral

 * Fistina

Aliens Used

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

Errors

 * 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.
 * This the first time three of Ben's love intersests appear together.
 * Ben makes 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."
 * The game seemed to be based on Street Fighter.
 * Julie said the flashback was "the last time they talked," which shown Ben was 15. However, the last time they talked was in The Ultimate Enemy: Part 2, when Ben was 16.
 * Ester mistook Julie and Hervé for Gwen and Kevin, who she has not met yet.