Jammbonians are one of two races living on Jammbo alongside the Dodos. They are fairly humanoid, with a variety of colorful skin colors, though we only see Jammbonians that are blue, pink, red or one of many shades of purple. A thin layer of hair or fur covers their torsos, arms and legs that is a shade darker than the skin of their heads, hands and feet. Jammbonian feet have two toes, resembling Jika-tabi.

According to the Queen, when a child is born on Jammbo, there is always a Dodo who raises them, Grandpa Dodo is one such Dodo, who raised Bello. It can be assumed that once a child reaches the age where they can reasonably raise themself, the Dodo leaves.