The Greatest Adventure trilogy is the three-part theatrical release for the finale of the Land Before Time series. It covers The Land Before Time XXIII: The Time of Choosing, The Land Before Time XXIV: The Incredible Journey, and The Land Before Time XXV: The Heart Whispers.
It is a coming of age story for Littlefoot, Cera, Ducky, Petrie, Spike, Chomper, Ruby, and Ali, among others. Due to the darker elements in this one, it, unlike the original Land Before Time, is rated PG for each movie.
Unlike the original movie, these movies has the main antognist as an omnivore.