In Willy's flashbacks, Wilbur Wonka forbids his son Willy Wonka to eat Halloween candy, but much to his disgust, Willy decides to be a candy maker and be runs away. Wilbur states that he "won't be here" when he comes back. True to his word, after Willy left, Wilbur transported himself and his house out of the street to another part of the country, to Willy's chagrin when he came back to the street.
Wilbur is next seen in the climax, where Willy and Charlie visit him in his relocated house, as Wilbur checks Willy's teeth, Charlie finds out that Wilbur has followed Willy's success. Wilbur recognizes his son and tells him "You haven't flossed". Willy replies that he didn't floss once, and they emotionally reconcile after all these years.
Willy is Wilbur's defiant son of who wants to express his dreams of being a conventioneer, against his father's wishes. Willy runs away, prompting Wilbur to move himself and his house from the street. Wilbur realized his error of his ways when he sees how well Willy is selling his famous chocolate, and he reunites with his son when he visits.
[to his son, after he finds out that he wants to be a chocolatier] "Candy is a waste of time! No son of mine is going to be a chocolatier!"
[in response to his son's decision to run away] "I won't be here when you come back!"
[whilst reconciling with his long lost son] "After all these years, you've never flossed."
1971 film: Main Title • The Candy Man Can • Cheer Up, Charlie • (I've Got A) Golden Ticket • Pure Imagination • Oompa Loompa (Augustus) • The Wondrous Boat Ride/The Rowing Song • Oompa Loompa (Violet) • I Want It Now! • Oompa Loompa (Veruca) • Ach, so fromm (alternately titled "M'appari", from Martha) • Oompa Loompa (Mike)
2005 film: Wonka's Welcome Song • Augustus Gloop • Violet Beauregarde • Veruca Salt • Mike Teavee • Main Title • Wonka's First Shop • The Indian Palace • Wheels in Motion • Charlie's Birthday Bar • The Golden Ticket/Factory • Chocolate Explorers • Loompa Land • The Boat Arrives • The River Cruise • First Candy • Up and Out • The River Cruise, Pt. 2 • Charlie Declines • Finale • End Credits Suite