Monsters Unleashed!

Monsters Unleashed! is the twenty-third episode of Ben 10: Ultimate Alien.

Air Date
December 10, 2010

Plot
The Faceless Hunter regenerates with 3 Starros merged with him to create monsters made of cardboards, junk, vehicles, and any kinds of things to possess with, And Ben and Alan will have to stop this plant.

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Kevin Levin
 * Julie Yamamoto
 * Alan Albright
 * Cooper Daniels
 * Helen Wheels
 * Manny Armstrong
 * Pierce
 * Mariella
 * Kai Green

Villains

 * Faceless Hunter
 * Forever Knights

Aliens Used

 * Eye Guy