Carl is seen with Frank, though it is unknown if they are friends or brothers. They love to make beautiful salads with dandelions, but when Sid spoils their meal, he discovered an aspect of their character that would not imagine: their fury! They both want Sid for the romp on him, but not to eat. Manny intervenes and takes action quickly, saving the sloth which he never did get rid of. It was the moment the two heroes met and the trio began to form!

Unlike his brother, Carl has a larger horn.