Billy and Bart are the bumbling henchmen of Dino-hunter Rick. They appear in Ice age: The time kids 2.
Neither one seems to be very smart, but Billy does appear to be the smarter of the two and comes with most of the good ideas. Bart, however, quickly rejects these ideas in favor of his own. Although Billy and Bart fill out Rick's deeds they do not enjoy it and do it only for money.
Billy has a slender, long nose, half bald head, black hair, brown cap, dark brown over coat, orange turtleneck, brown pants, and shoes. Bart is short, obese, long nosed, half bald, with black hair, a brown cap, a dark brown trench coat, tan turtleneck shirt, gray pants, shoes, and a eye-class.