flecko is a fly, who appears in the episodes "day of the flecko", in which he is a prolonged nuisance to rocko as the latter tries to get to sleep, "fly burgers", in which he sues rocko after feigning serious injury and "rocko's happy vermin" where he saves the rest of his bug friends. he has a glass eye that always falls out. he is the creation of timothy björklund and writer martin olson.