Malefactor

Malefactor is the fifteenth episode of Ben 10: Omniverse.

Plot
Ben and Rook are attacked by a Khyber in a festival, which is a decoy so that Malware can steal some information.

Major Events

 * Brainstorm makes his Omniverse debut.
 * Mt. Rushmore makes its first appearance as an active Plumber base.
 * Hypnotick makes his first appearance.
 * It is revealed how Malware got into his current form.

Omnitrix Alien Debuts

 * Brainstorm (Omniverse debut)

Nemetrix Alien Debuts

 * Hypnotick (first appearance)

Characters

 * Ben Tennyson (16 years and 11 years old)
 * Rook Blonko
 * Gwen Tennyson (11 years old)
 * Max Tennyson
 * Earth Plumbers (Flashback)
 * Plumber Jerry (Flashback)

Villains

 * Khyber (past and present)
 * Khyber's Dog
 * Malware (past and present)

By 16 year old Ben

 * Brainstorm (first re-appearance)
 * Stinkfly (cameo)
 * Wildmutt (cameo)
 * Spidermonkey (cameo)
 * Humungousaur (x3)
 * Heatblast (x2)
 * Armodrillo
 * Big Chill

By 11 year old Ben

 * XLR8
 * Feedback

By Khyber's Dog

 * Buglizard
 * Crabdozer
 * Slamworm
 * Hypnotick

Errors

 * Young Ben's eyes were blank after getting scared by the Psycholeterean.

Trivia

 * This is the first episode in which Khyber's Dog was able to transform/switch forms without Khyber whistling for it to do so.
 * Heatblast shouts his name in this episode, like in Alien Force/Ultimate Alien and Humungousaur and Big Chill in Of Predators and Prey: Part 2.
 * Gwen mentoined event in Ben 10 vs. the Negative 10 Part 2.
 * Ben mentioned Ghostfreak when Max said that  Psycholotereans hunt aliens that can turn intangable.