Outbreak

Outbreak is the eleventh episode of Ben 10: Omniverse.

Plot
Ben and Rook go to an underground Plumber prison. There, Dr. Psychobos ambushes them and steals a piece of the Omnitrix. Ben tries to transform, but the Omnitrix zaps Rook, transforming him into a half-Gourmand creature and the doctor escapes.

Omnitrix Alien Debuts

 * Wildvine (Omniverse debut)
 * Walkatrout
 * Kickin Hawk

Characters

 * Ben Tennyson
 * Rook Blonko
 * Max Tennyson
 * Blukic
 * Driba

Villains

 * Dr. Psychobos
 * Psyphon
 * Liam
 * Bubble Helmet
 * Fistina
 * Malware
 * Khyber
 * Khyber's Dog

By Ben:

 * Wildvine
 * Humungousaur
 * Walkatrout
 * Kickin Hawk

By Rook:

 * Upchuck

By Psyphon:

 * Heatblast

By Liam:

 * Humungousaur

By Fistina:

 * Upgrade

By Bubble Helmet:

 * Shocksquatch

Trivia

 * Due to Psychobos stealing a piece of an Omnitrix core, Rook was mutated into a half-Gourmand when Ben tried to transform. It also later transformed Liam into a half-Vaxasaurian, Fistina into a half-Galvanic Mechamorph, Psyphon into a half-Pyronite and Bubble Helmet into a half-Gimlinopithecus.