The main character is a 40-foot-tall purple gorilla. His catchphrase is repeating his name twice ("Grape Ape, Grape Ape") after anything anyone says, usually as a form of agreement or acknowledgement of what was said. He travels the countryside with his canine pal Beegle Beagle, whom he calls "Beegley Beagley" and hits a lot. A hybrid of King Kong and Casper the Friendly Ghost, Grape Ape's immense size tends to initially shock and frighten those unfamiliar with him, and his presence alone has often terrified people and animals, causing them to run off screaming invariably: "YEOW! It's a gorill-ill-ill-ill-la!".
Grape Ape and his friend Beegle Beagle usually move in a small yellow van driven by Beegle Beagle with Grape Ape sitting on the roof. A recurring bit of business would be for him to 'rev up' the tiny vehicle like a child with a friction toy, then hop aboard as the van would start on its way.
Given his size, Grape Ape's sneezes were equivalent to a hurricane; and when he cried, which was sometimes when he was homesick for his family, his tears could cause flooding in areas.