He appears to be a 1971 Plymouth GTX 440+6 that is painted entirely an unusual pinkish-grey, with the exception of a number 0 painted on his doors, surrounded by a white circle. While Sonny has no air intake in any other versions of Cars: The Video Game, he has one in the Xbox 360 version. He has an air intake in all but the PS2 version of Cars: Mater-National Championship.
Sonny is also seen during the cutscene that plays when the player enters Tailfin Pass for the first time. Lightning is crossing the bridge into Tailfin Pass when Koji and Otto speed by, with Sonny and Vince trailing far behind, questioning whether or not they have entered the right competition for their skill level.
Sonny's official artwork from Cars: The Video Game depicts him with a different spoiler; the sides are facing downward instead of upward, a much larger air intake with a metal bar going through the center, and four "fish gills" instead of three. He also has this appearance on his Cars: The Video Game icon.