Amazing 3

An anime series in syndication in 1967. The story involves three extraterrestrial beings who visit earth to decide whether it should be destroyed. They assume the physical forms of a rabbit (Captain Bonnie), a horse (Ronnie), and a duck (Agent Zero). They befriend an earth boy, Kenny Carter; together with Kenny's secret agent brother Randy, they fight crime and remedy world problems. They ground travel in the Big Wheel, a large tire-shaped vehicle with passenger space in its center. Mushi Productions, B&W. 52 episodes.