The Dinosaur

Plot
(Gwen): Ben, help us here! (shoot mana balls to the Forever Knights)

(Ben): This, glitching!

The Ultimatrix shoot a Devolve Beam at the Forever Knights and they become a....

(Kevin): What is this? Forever Caveman?

Theme song!

Trivia

 * Ben get suck as Devolved Humungousaur for 24 hours. (Until the next episode)