The Land Before Time XI: Invasion of the Tinysauruses (2005)

Plot
Every year, as the warm season approaches, a certain tree in Great Valley blooms with pink flowers. These "treesweets" are viewed as a delicacy by the dinosaurs of the valley, and as such everyone wants their fair share of it. However, because of the tastiness of the tree sweets, and due to the fact that there seems to only be one such tree in the entire valley, there is hardly enough for every dinosaur. Because of this, no one may eat the treesweets until the day when they reach the "peak of their tastiness".

Littlefoot and his friends Ducky, Petrie and Spike are eagerly waiting to eat the first treesweets of the season. Ducky is about to take one, but Littlefoot quickly tells her to stop. He reminds them all that none may take any treesweets until "Nibbling Day". This, however, does not stop Petrie from flying to the tree's crown to attempt to take a treesweet. Just then, Mr. Threehorn - Cera's father - emerges and states clearly how every dinosaur in the valley has waited all year to taste the treesweets. As Cera appears before them, she boastfully reminds the group that she is the one who is supposed to eat the first treesweet since she found the treesweet-tree in the first place, although it was Littlefoot who first found it. Cera also teases Littlefoot for being too little to reach the treesweets.

Meanwhile, Cera's father is visited by an old friend, a female threehorn named Tria. Cera's father, whom Tria calls Topsy, promises Tria the first treesweet of the season, which Cera becomes upset about. From this moment on, Cera refuses to make friends with Tria and simply shrugs her off whenever Tria attempts to talk to her. In addition, Cera turns violent toward her friends when they make any references involving Tria or Cera's father's nickname.

Littlefoot wanders off by himself, feeling very down and sulky about how "little" he is. As he returns to the treesweet tree, he climbs the cliff next to it and tries to reach the treesweets himself, just to prove that he’s tall enough to reach. As he does, he accidentally slips off the cliff, falls right through the tree, and knocks down every single treesweet. Realizing the trouble he is now in, Littlefoot faints in dismay. When he wakes up, he finds himself surrounded by several miniature longnecks. They have eaten all the treesweets and quickly run away once the shocked Littlefoot starts screaming in fear.

Upon noticing that every treesweet is gone, the other dinosaurs suspect that Littlefoot is responsible. Afraid to admit that he caused the treesweets to fall off the tree, Littlefoot makes a partial truth, blaming most of it on the miniature longnecks. At first, no one believes him, but when Mr. 3-horn finds teeth marks on a tree sweet that are too small for Littlefoot to have made, he is believed and everyone begins to look for the tiny longnecks, preparing to drive them out of the valley. As Littlefoot and Cera search the valley, Littlefoot falls down a pothole in the ground where, it turns out, the miniature longnecks are hiding. At first, Littlefoot is afraid of them and flees deeper into the cave, but he soon befriends the miniature longnecks. Upon hearing how difficult it is for the miniature longnecks to find food, he Littlefoot promises to help bring them as much food as he can every night.

Eventually, Littlefoot's friends find him while he is bringing food to the miniature longnecks. They also fall in the pothole, and upon meeting the tiny dinosaurs agree not to tell the adults. Even Cera, who is still angry with her father, promises to keep it a secret, mainly because she finds out she can relate to them more than they would have imagined. Many of the miniature longnecks in the colony feel that their leader, Big Daddy, bosses them around too much, though he simply is looking out for them. To Big Daddy, the larger dinosaurs of the Great Valley only seem to think that "because they're bigger, it makes them seem more important." Due to this, he does not trust the other dinosaurs.

When sneaking off to see the miniature longnecks, Littlefoot and his friends are busted by Mr. Threehorn. When he tries to ask them where they're going this time of night, Cera angrily throws the question back at him. He tells the children that it is the miniature longnecks they have to worry about, then tells them to "skeddadle, all of you!". He warns them to not let him catch them out late at night again, and orders them home. Then, he meets with Tria and they spot one of the miniature longnecks, Lizzie, and then Skitter. A chase ensues that ends when Mr. 3-horn and Tria finds the miniature longneck colony. As the grown-ups prepare to block the caverns, Littlefoot, realizing he must tell the full truth, admits that he made the treesweets fall from the tree. However, just as he is finished admitting his accident, and the grown-ups forgive him and decide to leave the little creatures alone at last, the miniature longnecks' cave collapses, trapping them inside, leaving Littlefoot very upset and wistful.

The tinysauruses escape into the Mysterious Beyond, where they encounter two large Deinonychus who chase them back into the Great Valley. Upon hearing that Littlefoot initially blamed everything on the miniature longnecks, Littlefoot's friends become upset and turn their backs on him, not wanting to talk with him. Angry at his friends' rejection of him, Littlefoot leaves and decides to set things right on his own.

Later, after a tragic mistake, Petrie, Ducky, and Spike feel remorseful for what they've done and begin to sob over the loss of their friend. With Cera’s help after she finally warms up to Tria who’s upset with Topps, they try to find Littlefoot and apologize for what they said to him; however, they mistake the sharpteeth for Littlefoot. The two carnivores lunge at them, chasing them through the Great Valley. Just as Ducky is about to be eaten, Littlefoot shows up and saves her. Topps and Tria come to protect the kids. When all seems lost, the miniature longnecks come to the children's aid and fight the carnivores. The grown-ups of the valley eventually reach the group and drive the sharpteeth back into the Mysterious Beyond through the same hole, which they cover up with a large boulder to prevent them from coming back. After everything is sorted out and friendships are repaired, Nibbling Day finally comes at last. Littlefoot can even reach now, and his grandpa notes how he’d grown, especially when he courageously stood up for the tinysauruses.

Voice Cast
Main article: List of The Land Before Time characters


 * Aaron Spann as Littlefoot
 * Anndi McAfee as Cera/Diplodocus
 * Aria Curzon as Ducky
 * Jeff Bennett as Petrie
 * Rob Paulsen as Spike/Kosh
 * Leigh Kelly as Skitter
 * Cree Summer as Lizzie/Pachycephalosaurus
 * Nika Futterman as Rocky
 * Ashley Rose Orr as Dusty
 * Michael Clarke Duncan as Big Daddy
 * Kenneth Mars as Grandpa Longneck/Apatosaurus
 * Miriam Flynn as Grandma Longneck
 * John Ingle as Narrator/Topsy
 * Camryn Manheim as Tria
 * Tress MacNeille as Mama Swimmer/Petrie's mother