They aren't very talkative, and in the beginning of Once-ler's rise to sucess, their only job is to try to pick the tufts off of the Truffula trees, but that soon gets too hard and they are moved on to work with the axe-hanking machine, which chops down the trees instead. Once Once-ler is at the top of his business and has his factory, Brett and Chet started working as his guards and doormen. They tried to "play ball" with Pipsqueak, who the Once-lers Mother thought was a bear.