The Land Before Time/Fairly Oddparents

Cast

 * Chomper as Timmy
 * Ali as Wanda
 * Littlefoot as Cosmo
 * Billy and Mandy (from The Grim Adventures of Billy and Mandy) as Timmy's Parents
 * Flapjack (from The Marvelous Misadventures of Flapjack) as Elmer