When a fight over their late mother's Royal Doulton Bowl accidentally leaves a crack in the family heirloom with Shamus and Clyde telling that the Banks children had broken it, causing their carriage wheel to break, Mary Poppins takes the Banks children and Jack inside the bowl to help fix the carriage wheel. When the children asked for a ride because they felt the trip was too short, Shamus and Clyde give the group a trip through the bowl to the music hall.
Later, when Georgie gets kidnapped by the Wolf and his accomplices, both Shamus and Clyde help drive them get on to the wagon carrying their brother.
- O'Dowd also portrayed Richard in the Marvel Studios film, Thor: The Dark World.
- O'Dowd was originally going to voice Tigger in the Disney live-action film, Robin as this would have been his first Disney role in 2018 while Shamus would be his second role in the aforementioned year. However, O'Dowd's test voice for Tigger was negatively received by fans for his participation as Tigger; as a result, Jim Cummings replaces O'Dowd in the role of Tigger in the final version of the film, who also voiced Pooh in the aforementioned film.