Roommates (1995)

Michael Holeczak has a most unusual roommate, his grandfather, Rocky. Now Rocky's a bit strange but loves Michael and only has his best interest. Michael would live with Rocky after his parents died. Michael would grow up go to school, become a doctor, Rocky would live alone abut when Rocky's about to be thrown out and placed in a retirement home, he refuses. Michael then takes him in. They would stay together even when Michael got married and had a family. And Rocky would always be there for Michael and Michael for him.