The Vengers are a group formed by Billy Billions to take down Ben and take his place as the protector of Bellwood. The group is subject to infighting between its members and was therefore defeated.
They first appeared in the episode The Vengers. Captain Nemesis is seen talking to Kangaroo Kommando who is in prison. He tells him of an entrepreneur - Billy who frees him from prison to form the group Vengers comprising of those three plus Mazuma - Billy's personal robot assistant. After convincing people through Will Harangue's channel that the Vengers have changed their wrong ways and are going legal, and also boosting their popularity by capturing thiefs they had paid such as Bubble Helmet, they overtake Ben as the most popular superhero group in Bellwood. Eventually while battling the Vengers as Brainstorm, Ben formulates a plan and starts acting that he has given up his superhero persona. Pretty soon, Brainstorm's prediction comes true and the group starts fighting among themselves, exposing their real identity to Bellwood. Having lost their superhero persona, the group resorts to their villainous ways and after being defeated by Ben, they fly off to avoid capture as Will Harangue turns against them in order to garner his ratings.