Mr. Frumble is a pig who often loses and chases his hat. He drives a pickle-car and is prone to vehicular accidents. Characters added in May 1971.

He was first appeared in Richard Scarry's ABC Word Book. His second video appearance is Richard Scarry's Best Counting Video Ever. He makes a cameo in the introduction segment (with his hat on) from the first video Richard Scarry's Best ABC Video Ever and in two songs Shapes (with no hat on) and Head Shoulders Knees and Toes from the third or fourth video Richard Scarry's Best Learning Songs Video Ever (with his hat on). He also appears in The Busy World of Richard Scarry and Busytown Mysteries.