Jack is the main hero of this game. He accidentally found an alternate dimension known as Fun World, and wanted to show Suzy Sweetheart this fantastic world. However, the businessman neighbor of his parents, Buzz Nizz wants to make money by selling living toys, who lives in Fun World, and also nabbed Suzy. Jack and another fellow Jack met, Teddy Bear, are going to save Fun World.
Jack was an unlockable Speed character. He's unlocked by either winning the 200cc in the Admin Cup or racing on Bow Prairie 100 times online. Jack's special item is the Box, which may either contain a Plunger, a Paddle, Firework or the Special Item of the one who's first.