HK-51: The Droid Assassin of Equestria

At the mountains behind the kingdom of the Crystal Empire, a crystal pony went hiking in the mountains when she discovered a cave. "Lets see whats at the other side of this cave," the pony said as she uses her horn to light the way through the cave. "Hello? Anypony here?" Bats then suddenly flew out of nowhere and scared the pony as they flew past her. "Oh. I see an opening." She then entered the opening in the cave and her jaw dropped like that she was shocked about something. "What is that thing," she pondered to herself. It was a 1.8 meter robot with a weapon attached on its back. "I need to inform the princess about this at once." She then ran to get outside of the cave to tell the princess about her discovery in the mountains.

Cadence was at her throne room reading letters from his brother about his time at Ponyville and asking how she is doing while she was running the Crystal kingdom. She giggled a little as she was reading the letters until a pony entered the room and said, Your highness. I bring news about what I found when I was hiking."

"Tell me everything you know," Cadence said as she rolled up the letter she was reading and listened to the pony's explanation. When the explanation was done, she then called her squire and said, "Take a letter to my brother."

"Yes, your majesty," the scribe said as she levitated a scroll and a quill. She then started writing what Cadence was saying so that the letter can be sent.

Charming Thunder was at Sweet Apple Acres helping Applejack buck some apples off of the tree. He bucked a tree and apples fell into the bucket. "Wow, Charming Thunder," Applejack said. "Not only you are good at flying a starship but you are also good at apple bucking."

"Thanks, Applejack," Charming Thunder said. "And thanks for letting me help today, Applejack."

"You're welcome. I'll let you know if you can help me again."

"Ok. I'll see you later." Charming Thunder then headed back to town to go back to Rarity's boutique to rest up his legs from kicking trees. when he entered the boutique, he saw Rarity making a dress for one of her clients. She then noticed him and greeted him.

"Hey, Charming Thunder," Rarity said. "How was helping Applejack?"

"It was fine. Thanks for asking. Is Sweetie Belle around?"

"She just left with her friends doing some crusading. Something about getting a cutie mark based on story writing. She said that they were going to the park to think about a story."

"Thanks for telling me, Rarity. I was going to the park anyways."

"My pleasure." Charming Thunder then left the boutique to see the Cutie Mark Crusaders at the park. "Now where was I? Ah. Yes. Placing this gem here."

"I GOT IT!" Scootaloo shouted. "How about we can write an adventure story. It can be like a journal of our greatest adventure."

"Yeah," Applebloom agreed. "but where are we going to go on an adventure?"

"Maybe Charming Thunder would know," Sweetie Belle said as a suggestion. "He has been on lots of adventures just like my big sis."

"Did I hear somepony say that they want an adventure?" Charming Thunder said standing right behind the group. Scootaloo was shocked that she didn't know that he was there this whole time.

"Oh. Hey, Charming Thunder," the whole group said.

"Hey girls." He then was looking at the red rose bush and thought about giving some to Twilight as a surprise gift. "I was just here to check on you three to see if you came up with ideas on a story."

"We were thinking an adventure story," Sweetie Belle said. "Do you have any ideas?"

"No." He then used his magic to levitate six roses off of the bush and started to walk past them. "But if I do, I'll let you two know if I---" He then accidentally bumped into Twilight like that she was looking for him.

"Oh. There you are," Twilight said while she was catching her breath. "I've been looking for you everywhere."

"What is it?"

"Its a letter from Cadence." She then levitated the letter and gave it to him and it says:

Dear Charming Thunder,

You and your friends have to come to the Crystal Empire right away. One of my subjects made a greatest discovery and I want you and your friends to investigate it at the cave in the Crystal Mountains. She said that it is a robot that is not turned on. Please hurry.

Your sister,

Cadence

"Gather everypony, Twilight. It looks like that there is something we have to investigate at the Crystal Empire. Oh. and these are for you." He then gave the roses to Twilight and smiled.

"Awww. Thanks, Charming Thunder." She then gave a kiss on his cheek and started to walk off to find her friends. "I'll gather them up and meet you at your underground hangar."

Charming Thunder turned to the Cutie Mark Crusaders and asked, "How would you three would like to go on an adventure with me and the group?"

"Sure," Applebloom replied. "We shall pack the stuff we need to start writing the story and we'll meet you at Rarity's place. See ya' later."

"Sounds like I need a journal in case I want to research this mysterious robot in the cave." He then rushes back to the boutique to inform Rarity of the situation.