The Royal Prank

Princess Luna is one of the four alicorn princesses that governed Equestria. Unlike Cadence and Twilight, who were made alicorn. Luna along with Celestia were born alicorns who have lived for thousands of years. Equestria back them was in chaos and poverty due to the past events with Dischord, the spirit of chaos, who is now reformed. Celestia wanted to keep the kingdom away from outsiders to protect the population, but Luna saw that the pony folk were already suffering from lack of food, and the two sisters argued, which Celestia winning each one due to her position, which drove Luna slowly into depression, forming Nightmare Moon one day, forcing Celestia to use the Elements of Harmony against her and sending her to the moon for a thousand years. It was when Twilight Sparkle arrived in Ponyville that she was released, and Twilight along with her new found friends used the new Elements of Harmony to remove her hatred and anger, leading her to realize her and Celestia’s mistake and solve it with her now forgiving sister together.

“That’s right, Twilight Sparkle. I am responsible for all this.” Luna spoke in a tone that was guilty, but did not seem serious.
“Why, Princess Luna, I thought you had changed.”
“I have! Didn’t you see my sister’s reaction? Wasn’t it funny?”
“Funny?! You mean…”
“I said it before, Twilight Sparkle. I thought it was just a harmless prank.”
Twilight, who was confused until now, started to get angry again.
“You see, back in the days when both of us were just fillies, we used to play pranks on each another in the old castle over by the Everfree Forest.”
“Yes, I know about that, there were contraptions and traps littered all over the place, and your favorite one was the trap door slide, right?” Twilight blurted out this information without thinking, but it was already too late.
“How do you know about that?”
Twilight smiled nervously.
“Um…I sort of read your journal of the two sisters in the castle…With Celestia’s permission!” She added, fearing a sudden outburst.
“I see. Well, I was raising the moon one day after Tirek’s imprisonment, and then suddenly my sister raised the sun behind the moon, creating a glowing black sphere! Before I could react…She slammed a pie on my face!”

“That would explain the lunar eclipse…Wait…WHAT!” Twilight stared at Luna.
“You two STILL play pranks on each other until today?”
“Well…we are sisters, so we’re bond to get on each other’s nerves sometimes.” Luna giggled. “Do you really think that we that serious every day of every year?”
“Still…Princess Luna, do you know how many ponies life’s did you affect?”
“What do you mean Twilight Sparkle? Only the Royal Guards have to deal with our mishaps.” Luna giggled again.
“You don’t understand do you, Princess Luna?”
Luna’s expression changed as she saw the serious expression on Twilight’s face.
“Because of your prank, Pinkie Pie’s under custody, Celestia’s in a state of shock, Shining Armor is not getting enough sleep, and Flash Sentry is now a suspected criminal for treason!”

Luna looked at Twilight, her face now slowly decreasing its happiness as the truth of her words sunk in.
“I…I…I had no idea…”
Luna sank to her knees and started to sob.
“It…seems…that I still don’t understand the meaning of fun.”
Twilight, seeing that her realization was true, now smiled and used her hoof to lift up Luna’s chin, seeing in her eyes the weakened form she had seen when she first came to Ponyville, helpless and pure while guilty of crime.
“Don’t worry Princess Luna. I forgive you. I’m sure if we explain it all to Celestia, it will be fine. Just…tone down on the pranks next time.”
Luna sniffed, and stood up.
“Ok.”
“But before we leave…could you explain how…”
Luna smiled faintly.
“Oh…you mean how did I manage to make such a prank? It was pretty easy. Flash Sentry is one of my most loyal guards and a prankster himself, so when I asked him to do this he gladly agreed. I stole the automatic cupcake dispenser and modified it into three cannons with the help of Dischord’s magic, who I recruited when meeting him outside the castle while he was visiting, knowing that though he is now truly reformed, he does like a good prank now and then.”

Twilight slapped her face again.
“As for the three fillies, I thought it would make it more surprising to you two, especially Rainbow Dash, since her sister is the leader of their group…that reminds me. I did not really freeze Rainbow Dash, rather trapping her in a time warp spell and changing her color to fool you. I’ll free her now.”
And with those words, her horn flashed, reverting all the mess she had made back to normal. A sonic rainboom could soon be heard with Rainbow angrily charging towards Luna, before Twilight stopped her with her own time warp spell.
“Wait…Princess Luna? Twilight? What’s going on? Where’s Flash Sentry?”
Releasing the spell, Twilight looked at Luna, and giggled softly.

“I’ll explain everything on the way back. Lets go back to Canterlot.”