When Judy Hopps needs to run a plate to find the missing Emmitt Otterton, she blackmails Nick Wilde to do so as she's unable to complete the task herself, on account of being new to the city. To annoy and waste her time, Nick takes her to Flash, and sadistically prolongs the meeting by telling a joke, which Flash takes a while to react to.
At the end of the film, it is revealed that Flash also has a liking for street racing, driving a fast and fancy sports car, before he is finally caught by Judy and Nick, the latter now the former's partner.
During the end credits, he and Priscilla are seen dancing in a slow manner at Gazelle's concert.
In promotion for the film, a puppet version of Flash appeared in a video where he visited the El Capitan theater to watch Zootopia. The puppet was both voiced and controlled by Persi.
An emoticon version of Flash appeared in the Zootopia entry of the As Told by Emoji short series. His first scene was a joking reference to the occasionally long loading times of smart phones. He also appears after the credits, prolonging the arrival of the "The End" banner.