Foreword: This is where the plot trails off. Derpy is the green ranger for more than one episode and she knows the identity of the red ranger (Rainbow Dash). Also, Derpy and Rainbow Dash will be rivals, so this will turn interesting very quickly. This foreword has gotten too long...
The scene opens on Derpy standing in the middle of a room at Nightmare’s moonbase, waiting for her. Then, Nightmare walks in.
“Derpy,” she said, “I have something very important for you to do.”
“Whatever it is,” said Derpy, “I’ll do it.”
“I need you to go back to Ponyville and-”
“What?” shouted Derpy. “Why do I have to go back? What have I done wrong?”
“You have done nothing wrong,” said Nightmare. “I only need you there so the ponies down there don’t become suspicious of you being gone.”
Derpy stood there, about to say something in protest, but instead sighed. “Very well,” she finally said. “If it your wish, I want nothing more than to fulfill it.”
“Very good, and in return, I will have a surprise for you.”
“Is it a muffin?”
“No, it is much better, and you will be able to easily defeat the Pony Rangers with it.”
“Can I still get a muffin while I’m at Ponyville?”
“Yes, you can have your muffins.”
“Thank you, Lord Moon.” After she said that, Derpy walked out of the room. She then teleported down to a clearing in the Everfree Forest where no-pony would have seen her. “If it is Nightmare Moon’s wish,” she said to herself, “it’s as good as done.” Then she flew out of the forest to Cloudsdale.
At Cloudsdale, we see Rainbow Dash talking with Scootaloo.
“No, Scootaloo,” said Rainbow Dash, “I’m not going to tell you where I’ve been the past two days.”
“Why not?” argued Scootaloo. “it’s not like you’re some super pony who’s saving the world.”
Rainbow flinched a little on the inside, but kept calm. “No, you’re right, but I’m still not going to tell you.”
“Fine,” said Scootaloo as she flew off.
Rainbow was about to take off when some pony crashed into her. It was Derpy.
“Derpy!” shouted Rainbow Dash, “what are you doing?”
“Nothing,” said Derpy, “just flying around.”
“The way you are, I’m not surprised,” Rainbow mumbled to herself, but her comment was still heard by Derpy.
“I’d better go,” said Derpy. “See you soon, Rainbow Dash.” Then Derpy flew off, saying “Real soon...” to herself.
Rainbow Dash stood there for a moment. “Is it me,” she finally said, “or is Derpy... different? Eh, it’s probably nothing.”
Rainbow Dash flew off, but Derpy remained hidden where she was. “So,” Derpy said to herself, “it was Rainbow Dash I saw yesterday... this will be fun. But first, I need a muffin.” Derpy then flew off.
At Canterlot Castle, Fluttershy and Spike were discussing the battle with the green ranger.
“I did see something on her suit,” said Fluttershy.
“Really?” said Spike, “What was it?”
“I’m not sure... It looked like... bubbles on her flank.”
“That might be her cutie mark. This is a very important detail.”
“I’ll go tell Rainbow Dash right away.” Fluttershy then flew off to get Rainbow Dash, but she walked in just as Fluttershy was about to leave.
“Fluttershy,” said Rainbow, “where are you going?”
“I was about to go get you,” replied Fluttershy. “I think we can ID our green ranger.”
“Really? How?”
“I saw what her cutie mark was.”
“What is it?”
“Bubbles.”
“That’s the evil green ranger’s cutie mark? Bubbles?”
“Yes... at least I think so.”
“Hmm...” Rainbow stood there thinking to herself for a moment. “I can’t think of any-pony it could be.”
At that moment, Celestia warped in. “It had to have been a pegasus,” said Celestia. “That will narrow down the search.”
“Also,” said Rainbow, “I did get a faint view of her eyes. They were yellow.”
“We better go try to find out who this green ranger is before she does something dangerous,” said Fluttershy.
Derpy was at Sugarcube Corner to order a muffin. A pink earth pony with a curly mane was at the counter with her back turned.
“Can I get a muffin to go?” asked Derpy.
“Sure,” said Pinkie Pie turning around.
“Do I know you from somewhere?” asked Derpy.
“I don’t think we’ve met before. I’m Pinkie Pie.”
“Okay, I’ll have a muffin to go.”
“Coming right up,” said Pinkie as she heard the phone ring in the kitchen. “I’m sorry, but I have to take this call.”
“Not a problem,” said Derpy as Pinkie went to answer the phone.
Pinkie answered the phone. “Sugarcube Corner, Pinkie Pie speaking... Oh, hi Rainbow Dash! What’s up?... The identity of the green ranger?... Ok, I’ll be on the lookout for somepony like that... Ok, bye.” Pinkie then grabbed the bag with the muffin in it and gave it to Derpy.
“Thank you,” said Derpy as she grabbed the bag and walked off.
As Derpy was leaving, Pinkie noticed Derpy’s cutie mark, bubbles. Before Pinkie could put 2 and 2 together, Derpy had left. Then, Pinkie had a grave realization. “Oh, no,” she said, “I gave her a cupcake!” At that moment, Derpy walked back in. “I’m sorry, ma’am, here’s your muffin,” said Pinkie, giving Derpy a different bag.
Derpy set the other bag on the counter. “Thank you,” she said as she grabbed the other bag.
Pinkie noticed the color of Derpy’s eyes, yellow. Everything came together in Pinkie’s mind. Derpy was the green ranger. “I’m sorry, ma’am,” said Pinkie, “but can you stay here for about five minutes while I make a phone call?”
“I could,” replied Derpy.
Pinkie was backing into the kitchen. “Good, now don’t move.” When Pinkie got out of Derpy’s sight, she pressed herself against the wall and started breathing heavily. “Should I morph and fight her?” she asked herself, “or should I call Rainbow Dash for backup?” She stood there for about a minute until she finally decided to call Rainbow Dash.
She was about to get the phone when she was stopped by a voice behind her saying, “Have to make a call?” It was Derpy standing in the doorway. “Well, don’t let me interrupt anything, pink ranger!” Pinkie tried to reach for the phone, but Derpy tackled her to the ground.
“Why, Derpy? Why are you serving Nightmare Moon?”
“Because she gave me muffins.”
“Really? If I gave you a muffin right now, would you fight against Nightmare Moon?”
“No, she also gave me the power of thunder. Now, no pony will think of me as the old Derpy Hooves. Now, ponies will fear me.”
“Not if I can help it!” Pinkie then threw Derpy off of her and sprang up on her hooves.
“Bad choice,” said Derpy as she flew at Pinkie. Pinkie tried to counter-attack, but Derpy swerved out of the way at the last second and came back around and knocked Pinkie against the wall, unconscious. “Huh,” said Derpy after a pause, “Walk in for a muffin; defeat a pony ranger. I can live with that.” Then, Derpy heard the phone ring. “Hmm... if I’m correct...” She then went over to answer the phone. Rainbow Dash was on the other line.
“Hello? Pinkie?”
“No Pinkie, here. Just your old pal, the green ranger.”
“What!? What have you done with Pinkie Pie?”
“Oh, she’s alive. But if you want to see her again, you’ll be waiting at Canterlot Castle, where I will attack. And you will be alone.”
“Fine.”
Later that day, Rainbow Dash was waiting, already morphed. At the same time, Rarity, Applejack, and Fluttershy were searching Ponyville for Pinkie Pie with little success. Suddenly, Rainbow Dash saw a large green dragon-like figure in the distance, and it was headed straight for Ponyville!
TO BE CONTINUED!