Sparky was one of the people in the crowd watching Mater with the Falcon Hawks at the air show after Black Hawk was hurt in the last practice. When Mia and Tia say that Mater is awesome, Sparky explains to them that Skipper had taught Mater everything he knows about flying.
After the short ends (Cars 2 DVD and Blu-ray only), Mater meets up with Sparky in front of Propwash Junction's sign and says that they should make a movie about planes. Sparky then says that's a good idea, and the two look at the audience in anticipation.
In Planes, it is revealed that Sparky was a Navy medic that served on the USS Flysenhower with Skipper. After Skipper's accident, he stayed with Skipper and still helps him in the present day.
Sparky reappears in Planes: Fire & Rescue.