After for so long putting Coraline through accidental Parental Neglect, Coraline's real mom and dad gladly join her for a gardening excursion.
After beating the Other Mother's hand, Coraline punches Wybie lightly on the shoulder. It may not seem heartwarming, until you take into account the earlier scene where Coraline's mother does the same to her husband...
Wybie coming to save Coraline in general. Think back to their previous interactions: Coraline has insulted, physically attacked, and kind of a jerk to him. Despite all of that this awesome guy immediately comes to her aid. That's true friendship before it ever started.
The dream of the three ghost children, who are all golden with halos, signifying that they can move on. The three give her a group hug to reassure Coraline she can take on the Beldam.
The fact that Other Father really did love Coraline.
The very end showing that Grandma Lovet will finally get closure of not only the truth of what happened to her sister, but also the fact she was finally able to move on, and that no more children will be at risk of The Beldum ever again, which said paranoia terrified her for at least fifty years.
Coraline telling the cat about the time her father performed a mild Heroic Sacrifice for her when they ran into a wasp's nest. He stayed behind to attract the wasps while Coraline ran and only when she was out of danger did he run as well.
The reason for the story - Coraline's father had told her he stayed behind because (as her father) it was the only to do. Coraline thinks of this story while she's going back into the other world to save her parents from the Other Mother. She's completely terrified, but goes anyway.
When Coraline phones the police to report her missing parents, telling the whole unbelievable story, the policeman who answers the phone gently tells her to wake her mother and get some hot chocolate to recover from her nightmare. It might have been entirely useless under the circumstances, but the policeman's response to a scared little girl telling such a strange story was very kind!
Coraline dreaming of a picnic with the three ghost children, whose spirits were released by her. They wish her luck in dealing with the Other Mother and leave for their proper afterlife.