A week into the future, Princess Celestia has called Godzilla into her office and shows him an enchanted window that can project his memories, giving the context for the Mother's Day special. At her request he shows her his memories of his mother, Azusa Gojo. He is very happy to be able to see her again, and this is part of Celestia's plan to get the citizens to accept him. He has given permission to make this public knowledge, and if they see how he was raised, then they will see how he is not a monster, but a friend. Celestia muses that it has been a long time since she had seen a human, but it is clear how much she loved her son and shaped him to what he is today. It reminds her of how her own parent and guides shaped her.
Celestia looks out the window and sees that Luna raised the moon about two hours early, then sees her flying away, staggering with stress. She has an idea of what happened and asks Godzilla if he had any bad dreams lately. Confused, he replies he had a nightmare about reliving the death of his father two days ago, but the dream abruptly ended. Celestia understands what happened, Luna saw his dream and ended it because it stirred up her feelings of loss for her own father figure. She sees Luna move toward the woods near Canterlot and orders him to follow her, for Luna will most likely not want to see her right now.
Luna wanders the woods until she finds a massive old tree. Near it is a tombstone, protected by a spell so that it would not erode. She reads the name and bows her head.
About one thousand years ago, Star Swirl the Bearded was working on his spells when his apprentice Clover the Clever burst in. Two young foals had been discovered in the Everfree Forest, near a strange looking tree. He is shown to them, and is astonished that they are two baby Alicorns, which shouldn't be possible as Alicorns were just a fictional race that they thought up and put on their flag to represent the new alliance between Earth Ponies, Unicorns, and Pegasi. One was a white foal with a pink mane and appeared about half a year old or so. The second, a much smaller blue foal was a baby who looked barely a month old, was half snuggling and half hiding in her sibling's hooves. Despite their early age, a conical horn and set of wings were clear as crystal on both of them. The two foals started curiously playing with his beard, and he sighed and said this was a good omen.
Six months later, Star Swirl started to regret volunteering to raise them. They are already exceedingly powerful in strength, flight, and magic, and they grow at an accelerated rate. Celestia already knows how to read and study magic, but she and Luna are nonetheless hyperactive little brats and it drove him crazy trying to keep track of them and stop them from wrecking his home.
When Luna stole Celestia's cupcakes and books, the two sisters started roughhousing and blasting each other. Fed up, Star Swirl roared at them to cut it out and behave. Suddenly, the old ceiling collapsed on them, but the sisters were able to stop it with their telekinesis. They rushed to him and started crying. It was then that he realized his error. He had been treating them like adult students and not like the children that they are. He soothed them and said they would cancel the studying for the day and go for a walk.
About fifteen years later, Celestia and Luna defeated King Sombra, but as a parting gesture of spite, he caused the Crystal Empire to vanish. Star Swirl explored the north, trying to find survivors, but all he found was a trail of paw prints and some residual Crystal Pony magic. Before he could follow it, he sensed Celestia and Luna in distress and returned to the Castle of the Two Sisters as fast as he could. He found blasts of light and blasts of darkness shooting through the castle and assumed they were fighting someone, but when he tried to approach and help, a stray blast created an explosion that knocked him unconscious.
He woke up to find an injured Celestia crying. Her pink mane had changed to a rainbow like design. When Luna gave in to darkness and became Nightmare Moon, Celestia was forced to resort to using the Elements of Harmony, thinking they would change her back, but instead, they banished her to the moon. Celestia pleaded to the Elements to bring her sister back, but they became inert as she was no longer worthy of wielding them. Star Swirl hugged her and started to cry himself.
Back in the present, Godzilla finds Luna crying over the tombstone, Star Swirl's grave. Despite her ordering him to leave, Junior stubbornly refuses to abandon a hurt friend. Deducing what is going on, Godzilla takes a seat next to her. He confides that his father Godzilla Senior died when he was only two years old, and he wasn't even conscious when it happened. Luna knows, as seeing it in his dreams reminded her of her own failings. She was only twenty when she became Nightmare Moon and was banished. Because of this, she wasn't there when Star Swirl died of old age around Celestia's 110th year. She laments that it might have been for the best, as Celestia was always the better student and leader, and he probably spent the rest of his life remembering Luna as just another failure.
Junior disagrees.
He confides that he only lived with his mother for about eight months and then his father for a year and a half. He can never be near Azusa ever again without accidentally poisoning or crushing her, and he will probably outlive her by decades or even centuries assuming he isn't killed. He advises her to savor all the memories of Star Swirl, for as long as she remembers him, he will never truly be gone. And based on everything he's seen of her, he is sure Star Swirl would be proud of the princess he helped raise. Luna gives herself some long thought and calms down, still grieving but extremely grateful.
Up in the night sky, the stars form a constellation of Star Swirl the Bearded, who smiles down at his two adopted daughters. And back on Terra, the aged Azusa Aoki née Gojo cradles an old picture of herself and her son as she sits on her porch. Somehow, some way, she is sure that he is still alive.
Children are shaped by the figures they'd call parents, be it parents by blood or circumstance. Behind every heroine or hero is a predecessor to guide them.
Happy Mother's Day and Happy Father's Day
