Cartoon All Kart/Bonuses

Unlockables

 * "The Camping Episode", "Blackjack" and "Help Wanted".
 * Clips from Simpsons episode "The President Wore Pearls"
 * Unlock 2,000 Keys in Level 16

NPCS (unlockable)

 * Sheriff Woody
 * Waylon Smithers
 * Chief Wiggum

Collectibles

 * Keys
 * Engines
 * Donuts