Showdown: Part 1

Showdown: Part 1 is the twenty first episode of Ben 10: Omniverse.

Plot
The Faction infiltrates Galvan Prime.

Major Events

 * Omnivoracious and Vicetopus make their debuts.
 * Ben reveals why he stopped using Feedback.
 * Galvan B is destroyed.
 * Dr. Psychobos and Khyber's Dog are taken to custody, while Khyber escaped with the Nemetrix.
 * Azmuth makes his present day debut.

Nemetrix Alien Debuts

 * Omnivoracious (first appearance)
 * Vicetopus (first appearance)

Characters

 * Ben Tennyson (11 and 16 years old)
 * Rook Blonko
 * Gwen Tennyson (11 years old)
 * Max Tennyson (61 years old)
 * Derrick J. Wyatt
 * Azmuth
 * Pakmar
 * Fergi

Villains

 * Khyber
 * Khyber's Dog
 * Dr. Psychobos
 * Malware

By 16 year old Ben

 * Heatblast (accidental transformation; intended alien was Water Hazard)
 * Humungousaur
 * Ball Weevil
 * Big Chill

By 11 year old Ben

 * Feedback (x4)

By Khyber's dog

 * Omnivoracious (x2; first appearance)
 * Tyrannopede
 * Terroranchula
 * Hypnotick (x3)
 * Vicetopus (first appearance)

Trivia

 * It is revealed in this episode that Feedback was 11-year-old Ben's favorite and most used alien. It was later removed and destroyed by Malware with an additional error of not allowing the Omnitrix to accept any new Conductoid DNA. However, it is later seen being used again in Store 23 by 16 year old Ben.( that episode was intended by the producers to air after this episode)