Ultimate Upchuck (Earth-69)

Boomchomp is the Hidden Universe's DNA sample of an unknown species from an unknown planet.

Back in Action: Alien Universe

 * In Welcome to Chronospect, Boomchomp appeared multiple times to attempt to stop the Commander.

Back in Action: Alien Universe

 * Welcome to Chronospect (first appearance) (x3, first time: accidental transformation, selected alien was Eatle; second time: accidental transformation, selected alien was Eye Guy; referred to as "Munchtrosity")

Trivia

 * Ben jokingly referred to Boomchomp as "Munchtrosity." This is the second time Ben used a joke name on an alien, the first being with canon ChamAlien in his debut episode.