Thank you for the questions
As for dark LBT fanfictions it is simply that what I have read of them had very little to do with the land before time except for the names of characters (who did not tend to act like the LBT characters would) and places.
The land before time is not the same as Pokemon, Star Wars, Resident Evil or the other franchises it is often connected with. I know very little about Pokemon (the example which you picked), but for all I do know it is much about fighting often in a sport-like competition and sometimes on a more serious basis and about the trainers training the pokemons to become ever better fighters. This is not the nature of the land before time. Dinosaurs would have very different motivations from humans. I am not unaware of the "entertaining value" of violence and I will not pretend not to enjoy this entertainment in the right contexts as well. However, based on what we see in the movies dinosaurs from LBT are not thinking along the lines of humans who will kill each other for all kinds of reasons, sometimes even for sheer lust of killing. In LBT the prime reason for violence is the wish to survive (both for a sharptooth who needs to eat and for a leafeater who doesn't want to be be eaten). There are such motivations as racism which in a given context might lead to violence, but for the large scale slaughter shown in some fanfictions I have seen the dinosaurs just don't have the motivations. I don't see for example why large groups of sharpteeth would team up to "conquer" the Great Valley. concepts such as "possessing" land are probably more alien to land before time dinosaurs than they were to native Americans. As for the example with the sharpteeth they would need a lot more food to sustain a large group than they would as individual hunters (talking of the large kinds of sharpteeth now rather than the smaller raptors), they would find a lot easier and less risky prey in the mysterious beyond, and if they did "conquer" the Great Valley they wouldn't have really gained anything for the great risk of their lives they took. It is just one example where I feel fundamental basis of the land before time universe are being ignored just to get as much war and violence as possible into a story. Others may think different and it is okay for others to think different. But I feel I have good reasons not to think of such stories as being really in the spirit of LBT and therefore not liking them myself.
(On a side-note after having read what has been written elsewhere, I do not think very high of my own land before time stories. While they do not really violate the rules of the LBT universe they all have major drawbacks. The plot of "The big quarrel" is in many ways foreseeable and following clichÈs. To some degree I'm afraid I have served the same "dull sharpteeth" problem that we see in some later LBT movies. Parts of it are just plain unrealistic and the story doesn't include any own characters (lack of own characters isn't necessarily a shortcoming if the own characters wouldn't contribute anything to a story. But own characters can also add a lot to an LBT story. Sometimes own characters take over the story so much however that the actual land before time characters play little to no role at all anymore.). Moreover my English by the time I translated "The big quarrel" (2000 and 2001) was so bad that I am surprised anyone would read the story at all.
With "The Cold Time" there are many similar problems. I think the main problem of that story however is that it is above all a sequence of episodes of very limited coherence.
"Old Threehorns" finally is probably better in some ways than the earlier stories but is still suffers from being very long winded. With this story I think I also got very close to putting a toe across my own expectations of what is or what is not likely and possible in the world of LBT. It sure would come closest to a "dark" LBT story. However since I started writing it back in 2002 movies have appeared which tear the story of "Old Threehorns" apart. I am not likely to finish it.)
Pies? I suppose I do like them, but I think pie can be translated as a variety of rather different dishes. On the one hand a pie can be a cake on the other hand it can be a dish involving meat, cheese, and various ingredients. Of both versions there are kinds that I like (admitting though that in some cases I am not a hundred percent certain if the dishes I am thinking of would pass as "pies"). Which are the kinds of pies you are asking about about?