Waddle Doos are similar in appearance to Waddle Dees. They are round, light-coral-colored creatures with stubby arms, light orange feet, and one large eye protruding from the middle of their heads. Above their eye is two strands of hair. Red is their most common color, but they can however appear orange, gray, green, turquoise, etc. They have no mouths, but in Kirby: Right Back at Ya!, King Dedede's lone Waddle Doo servant can speak, and is the only one who can communicate with the Waddle Dees.

(Source: Kirby Wiki)