The Land Before Time XI Invasion of the Tinysauruses is a 2005 directtovideo animated film and the 11th film in the The Land Before Time series.
As the film begins, Littlefoot and his friends Ducky, Petrie and Spike are eagerly waiting to nibble the first treesweets. Ducky is about to take one, but Littlefoot quickly tells her to stop and reminds them all that none may take any treesweets until Nibbling Day. This however, doesnt stop Petrie from flying to the trees crown and trying to take one. Just then, Ceras father emerges and states very clearly how every dinosaur in the valley has waited a long time to taste the treesweets. As Cera, too, appears before them, she reminds them that she is the one who is supposed to get the first treesweet because she was the one who found the treesweettree in the first place, although it was indeed Littlefoot who did it. Cera also teases Littlefoot for being too little to actually reach the treesweets.Meanwhile, Ceras father is visited by an old frienda female threehorn named Tria whom, it seems, he used to have a crush on. She also reveals his name to be Topsy although it may simply be a nickname. After speaking a while with her, he promises Tria that she will get the first treesweet of the season which Cera, who appears just in time to hear him say this, becomes very upset about. From that moment on, Cera refuses to make friends with Tria and simply shrugs her off whenever she tries to talk to her. In addition, Cera will turn violent towards her friends should they make any references involving Tria be it Tria herself or Ceras fathers nickname. ........
Source: Wikipedia