Robert is Huey and Riley’s grandfather and legal guardian. He moved them all to the upscale suburb of Woodcrest so that they could raise the boys in a peaceful environment and enjoy his retirement. Robert has bore witness to many some major incidents in American history. He was a part of the Civil Rights Movement, but was prone to certain faux pas such as donning a raincoat in preparation forgetting doused by a police fire hose. Robert was also a fighter pilot in World War II, during which time he flew a P-51 Mustang with the Tuskegee Airmen. He was also a part of the Montgomery Bus Boycott, even sitting next to Rosa Parks, though she received all the credit for refusing to give up her seat while he, having actually refused before her and much to his chagrin, received none.
Granddad occasionally serves as a more pragmatic voice of reason. Though he has expressed his ashamedness for Huey and Riley, and though he sometimes gets distracted with his unending quest for a younger wife, his intentions are, for the most part, derived from what he believes is in his family’s best interest. This is where he most often finds himself at odds with his grandsons. Huey and Riley, though possessing contrasting personalities, tend not to act in a manner in line with their grandfather’s desire for simplistic living. Riley gets in trouble a lot, and Huey always has his eye on some bigger picture. As a guardian, he does not hesitate to use corporal punishment where necessary.
It is unknown exactly how Robert came to be Huey and Riley’s guardian. It is strongly suggested that Huey and Riley’s birthparents are deceased. This is, in part, based on Robert’s dialogue from the first episode stating that he spent the boys’ “inheritance” on their new house in Woodcrest.