Bud Robinson

Bud Robinson (better known as Grandpa Bud) is the grandfather of the Robinsons.

Personality
He is a funny type of person. He likes to wear his clothes backwards. His eccentricity is shown when he has a painted smiley face on the back of his head. He has problems keeping his dental features-his teeth-inside his head.

In the Film
He's first seen in the future of the year 2037, having been startled by Lewis, who accidently bumped into him, but ends up laughing and asking him if he had seen his teeth anywhere, for he's been digging holes in the yard all day and couldn't find them anywhere. He starts his conversation by joking about the smiley face drawn on the back of his head, and kept replying that he didn't know where the garage is and reveals that he didn't know it then but he had a Woodchuck living on his arm, hoping it didn't have any rabies. Lewis begs him to take him to the garage,so he does so by exploring the Robinson home by using the travel tubes.