Byron is a former classmate of Rallo at the Stoolbend Daycare Center. At their two year graduation reunion in "BFFs", Byron speaks Italian for Rallo which he mistakes as gibberish. When Donna finds out that almost all of the other kids have advanced intellectually, Donna enters Rallo into a quiz bowl to prove he is as smart as the others. Byron also participates in the Quiz Bowl.
Carlos McCullers provided the voice of Byron.