Mario and Luigi's grandfather

A grandfather of Mario and Luigi, appearing in The Super Mario Bros. Movie, is shown as a member of their family during a dinner gathering.

The Super Mario Bros. Movie
In The Super Mario Bros. Movie, the grandfather is shown living with Mario and Luigi's mother, requiring her help to feed him. He wears an old-fashioned green hat and a plaid brown shirt. He appears with Uncle Arthur and Uncle Tony during dinner, laughing at Mario and Luigi about their Super Mario Bros. Plumbing commercial, though he has no interest in the conversation. Being old and toothless, he uses crutches to walk and needs to be helped when eating. After Mario and Luigi defeat Bowser and save Brooklyn together, he celebrates his grandsons' heroism alongside the rest of the family. It is implied that he used to be a boxer when he was younger.