Lowly Worm is a Busytown resident and Huckle Cat's best friend/pet. He often stays with the Cat family as a house guest. Although he attends school with the Cat children, Lowly can also be seen in more adult situations, like driving a street sweeper or working in the operating room of the Busytown Hospital.
- He did not speak in Richard Scarry's Best Videos Ever until The Busy World of Richard Scarry and Busytown Mysteries.
- In The Busy World of Richard Scarry, he frequently breaks the fourth wall.
- Lowly announces every episode title of Busytown Mysteries.
- He wears a Tyrolean hat, a brown or red shoe on the end of its tail, a blue and green tube on his body (intended to resemble a sleeveless shirt and one-legged trousers) and has a red bow tie.
- He rides in the apple that looks like a helicopter.
- His skin colors are light, plain or dark brown, pink, orange, peach or gray.