The crossover story with Beware the Batman and My Little Pony: Friendship Is Magic.
Disclamier: I don't own Beware the Batman and My Little Pony: Friendship Is Magic.
Chapter 20 The Lightning
3 Weeks Later, Nighttime in Canterlot...
"You are going marry?!"Asked Luna
"Of course! Doesn't it great?"Asked Celestia
"Oh I'm happy to see you happy Tia!"Said Luna
"I knew that you will understand this."Said Ceelstia and she's hug her little sister.
"I love you Luna. Nothing will change. I promise you that."Said Celestia
"I love you too Tia."Said Luna
"Tomorrow is going to be a very perfect day!"Said Celestia
At the Cave in Everfree Forest...
"When Princess Celestia said 'I will' she will under control of me for eternity!"Said Ra's al Ghul
"And we will no longer being the criminals!"Said Silver Monkey
"And I can finally kill Nightmare Moon and Discord with no anypony stand in my way!"Said Deathstroke
"All of your wishes will be granted, just be patience."Said Ra's al Ghul
"As you said... great one."Said Cypher
Nextday at Canterlot in the Royal Palace...
"This going to be a very nice day!"Said Celestia
"Are you sure you okay sis? You're look... happy than usual!"Said Luna
"Sorry I'm just excited too much! I was about to getting marry!"Said Celestia
"Yeah..."Said Luna
Meanwhile in the Garden...
"Everything are nearly finish. Only have to wait for Rarity come up with a wonderful wedding dress for Princess Celestia!"Said Twilight
"But we wait for three hours! Don't tell me that she just do it today!"Said Applejack
"If she do, she's better hurry. Pinkie Pie, Fluttershy and Rainbow Dash nearly finish helping the others to gather stuffs up."Said Twilight
At Carousel Boutique...
"Oh my goodness! We're not going to make it in time! WE'RE NOT GOING TO MAKE IT IN TIME!"Said Rarity as she's patching the wedding dress.
"Here what you ask for Rarity!"Said Sweetie Belle and she's push a box of gems with Spike to deliver it to Rarity.
"Thanks-both-of-you!"Said Rarity and she's quickly grab some of the gems with her hooves and 'fix' them with the wedding dress.
"Well... if you need me. I'll be in the kitchen. Grab some snack."Said Sweetie Belle
30 Minutes Later...
"Oh yeah! I do it in time!"Said Rarity
"WOO-HOO!"Said Spike
"That's my big sister!"Said Sweetie Belle
"Come on Spike! We have to go for a wedding!"Said Rarity
2 Hours at the Garden in Royal Palace of Canterlot...
"This must be a perfectest day in her life!"Said Fluttershy
"I concur with that darling. For a mare no any such moment will be better that wediing and... *giggles*."Said Rarity
"Umm... what's the next part sis?"Asked Sweetie Belle
"Yeah! Can you tell us?"Asked Apple Bloom
"Please! Please!"Said Scootaloo
"When you three grow up enough. Then, you can have the right to know about the second part of what Rarity just said."Said Applejack
"Here she's come!"Said Rainbow Dash and the door open and by the Royal Guards and Princess Celestia walk out in her very wonderful wedding dress.
"I'm so pround in this design of me!"Said Rarity and the Princess reaches where's Ra's al Ghul is waiting for her.
"BOOM!"
Everypony were shock and look up on the ceiling and see a group of the Djinns jump down through the broken ceiling. Princess luna quickly run out from the crowd.
"This is over Ra's al Ghul!"Said Azrael
"Ra's! What're they talking about?!"Asked Celestia
"I dont't even know who are they."Said Ra's al Ghul
"Nice lying. But truth is truth! Surrender and we will go easy on you!"Said Azrael
"NO!"Said Ra's al Ghul and three Djinns run up to him and try to hit him with their staffs. Then, Stallion-Bat jump out from the shadow and kick three of them away.
"Elemental! Katana!"Said Stallion-Bat and they both jump out from the crowd and prepare for the attack.
"Please listen! You don't know who you are protecting!"Said Azrael and Elemental's grab him at his cape and throw him to hit the wall.
"Why should we believe from the attacker?"Asked Elemental
"Because I know him."Said Batmare and she's walk out from the shadow.
"Batmare!"Said Elemental
"You're late for the party."Said Katana
"Mistress Vision had already checked him up. What are these Djinns said is true."Said Batmare
"Enough talking!"Said A Voice and Deathstroke jumps out from the crowd and kick her at face.
"Get everypony out of here!"Said Batmare
"As you said! Everypony need to leave this place! NOW!"Said Elemental
"Ra's! How could you?! You make me fall in love with you so you can rule my kingdom?!"Asked Celestia
"Absolutely!"Said Ra's al Ghul and he's smile out in evil way. Then, a tentacle of Cypher get 'into' her neck. Controlling her.
"Continue the wedding!"Said Ra's al Ghul
Meanwhile at the Entrance...
"Hurry up!"Said Stallion-Bat
"We need to get them out safe!"Said Katana
"You don't have to tell me that!"Said Elemental and the Silver Monkey jump down from the roof with 20 of the Marehunters.
Then, Clayface shows up from behind of them from nowhere.
"The wedding is just start! The cake is not yet being cut!"Said Silver Monkey
"If you think you're going to stop us! You're wrong!"Said Rainbow Dash and she's prepare to fight with Silver Monkey.
"This is our job! No need to get yourself to get hurt!"Said Katana and she's pull out her katana sword and run to fight him and his Marehunters.
"Crud!"Said Rainbow Dash
In the meantime at the Balcony...
"Why don't you surrender?! Nightmare Moon!"Said Deathstroke
"What?!"Asked Batmare and she's punch him with her left hoof.
"How did you knew about who I am?"Asked Batmare
"My Marehunters had patrolled around Canterlot and find the place where are you rest.
When one of them found you with no mask in the Royal Palace. I knew that it was you."Said Deathstroke
"So you had stalked me the whole time?"Asked Batmare
"Of course! I had to learn about you before I will encounter. Since the last time."Said Deathstroke
"What did I ever done to yoU?! I don't even know about who you are!"Said Batmare
"Did Commander Thunder means nothing to yoU?!"Asked Deathstroke
"You know him?! So this is a revenge isn't it?"Asked Batmare
"I AM HIM! AND OF COURSE! THIS IS REVENGE! FOR EQUESTRIA!"Said Deathstroke
"Why did you do all of this? I thought a such one as you will never come to this far!"Said Batmare
"Like you? MONSTER!"Said Deathstroke and he's run to her and pull out a sword from his collar to slash her.
Azrael's jumping and stop him hit him with his staff at face and then shoot a blue fire ball to him and he's float to hit through the wall and landed on Cypher.
With Cypher's fall down, his tentacle that he put on neck of Princess Celestia is separate from her. She is now fully control herself again.
"Fine! I don't need you anymore!"Said Ra's al Ghul and he's pull out his staff and shoot a bue fire ball to Princess Celestia but she shoot a beam from her horn to him.
The beam slashes the blue fire ball apart and hit at Ra's al Ghul. He's fell on the ground with a painful burn on his chest.
"Ohh..."Said Ra's al Ghul
"Stay down!"Said Batmare
Later in Arkham Asylum...
"As you see. All psychotic prisoners of our had transported to here. In this asylum."Said Celestia
"Now it's your turn!"Said Batmare and she's put Deathstroke in to his cell.
"I will tell you one Commander Thunder. It was you who are a monster!"Said Celestia and she's look into another cell where Silver Monkey and Cypher were being locked together.
"As for Clayface..."Said Stallion-Bat and he's look at him being imprisoned in his cell with Elemental and Katana.
"Ra's has been 'return' to the place wher he is belong now."Said Batmare
"I hope that we don't have to meet him again."Said Celestia
"Me nethier."Said Batmare
Meanwhile at the Abandoned Warehouse in Ponyville...
"Bravo Batmare!"Said Anarky and he's grab the chess with head of Batmare.
"Shall we... play again?"Said Anarky and he's put down the chess and grab the other chessess to look at find next 'warrior' of him to play.