The part at the end where Ducky introduced Spike to his new family, her family!! CUUUTE!
When all five main characters fall asleep together in a pile.
What's the first thing Mama and Papa Sharptooth do when they find Littlefoot's foot stuck in a log while Chomper is trying to help? They snuggle their baby!
For some reason, Spike taking an immediate liking to tickles (an early mammal from the 4th movie) is really adorable. Especially as they're the first to find the night flowers together.
In the 5th movie, Chomper seems positively overjoyed to finally have friends on his island, and does everything in his power to try to keep them safe and happy. Inverted when he finds out several of them still don't trust him despite his efforts, causing him to walk away in tears. Reverted again when Littlefoot runs after him to comfort him.
Another scene from the 5th movie has Littlefoot jumping off a cliff to rescue Chomper from drowning.
"We live in a whole other world and we miss it. But we'll always be friends chomper."
Petrie's Uncle Pterano finally owns up to his mistakes, and tells petrie that he will endure banishment, but will dearly miss him.
Ducky finally manages to say she loves spike after getting mad at him through over half the 8th movie.
Just the fact that Littlefoot finally meets his dad, despite the circumstances.