• Published 23rd Nov 2022
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My Little Pony: When Friendship Shimmers - Reboot - RobtheMorpherPony



What if Sunset Shimmer became a surrogate sister to Twilight Sparkle?

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Season 5: Episode 6 - Castle Sweet Castle AU

"Ugh..." Twilgiht could be heard with her head on the cutie map. "Even with the ponified humans living her for the time being while we search for the possessed Milissa so we can save her from the spirit of Marina the Merciless, I know they'll be able to go home eventually." The purple alicorn said. "But just thinking of how empty the castle is going to be once they are gone is starting to hit me now even before we have a great plan on capturing the possessed Milissa so we can exercise Marina the Merciless from her."

"I don't think I've ever seen you this distraught before." Sunset said.

"Hey, I have an idea." Starlight said. She then whispered to Sunset.

"Huh. That would be nice to do. I'll go get Flash Sentry." Sunset said. "...The one who came from the human world originally, not the Luxray whose in charge of Lightning Town."

"Yeah that's going to take some getting used to." Starlight said.


"Wow, I never expected you to be the one to approach me about taking some time away from the castle." Twilight said.

"Hey, as your guard captain, it's supposed to be my job making sure you takes some personal time. Plus, from what I heard, your friends are going to be busy with personal projects today, so this is the perfect time for a date." Flash said.

"What kind of projects are my friends working on?" Twilight asked.

"Beats me. I only confirmed it with them." Flash said; thankful that Twilight couldn't detect lies like Applejack could.


"Decorate Twilight's Castle?" Rainbow Dash asked Sunset.

"Yeah. We're going to do some interior decorating today. I've got the Flash from the human world distracting Twilight with a date. So, hit me with some great things we could do to make this castle more homey for Twilight." Sunset said. "Even I'm having a difficult time deciding on something that would just scream Twilight, so...hit me with whatever ideas you got."

"Wow, Sunset having trouble with her surrogate sister? That's a new one." Rainbow Dash said.

"Rainbow Dash, that was just rude!" Applejack said.

"Sorry." Rainbow Dash said.

"I wonder if her realization of cabin fever may be because she still has memories of the Golden Oaks Library." Fluttershy said.

"...Hey, that gives me a great idea. C'mon everypony, I've got a plan!" Rainbow Dash said.

"Rainbow Dash has a plan? Why do I feel like this could either be something really good, or really bad?" Sunset asked.

"Yer not the only one, partner." Applejack said.


As the sun began to set, the two lovebirds returned to the castle, only to find a new chandeliar made from a similar oak to the golden oak library hanging above the map. "Oh hey, we were just finishing up here." Rainbow Dash said.

"You all helped make this?" Twilight asked.

"Yeah. That way you could remember all the things we did in the Library. It's not the exact same tree, but we found a nearly dead one from the same oak that grew that library to begin with." Rarity said.

"We created these memory crystals so you could look back on the times we spent at the Golden Oak's Library any time you felt like it. Sunset helped Rarity make them." Fluttershy said.

"Gems are my speciality after all." Rarity said.

"It's...it's perfect. It's just what the place needed." Twilight said.

"Though, one thing: Pinkie Pie couldn't help but hide a few of her party cannons around the place. So...do be careful of that." Rainbow Dash said.

"What can I say? I made hid them so well, not even I could find them now!" Pinkie Pie said. Every pony laughed.

"Oh Pinkie..." Twilight said through her laughter.

Author's Note:

So for future reference, the Flash Sentry from the human world that is Twilight's special some pony will simply be referred to as "Flash" or "Flash Sentry" while Luxray Flash will be referred to as "Mayor Sentry" unless Lightning is talking about him, at which point Lightning will be referring to Luxray Flash as his father.

There isn't much I can do to fix this right now. Seeing as right now, Lightning Town is going to be a regular visit spot during Season 5 and even season 6. It's already part of Season 5 thanks to the main season 5 antagonist being Marina the Merciless, but it'll also be involved in the season 6 villain plot. But I won't spoil what I plan to do for season 6 quite yet. But I will tell you this: The season 5 moments that take place in Lightning Town will hint towards the Season 6 villain. All I will tell you at this time is that the season 6 villain will not be Chrysalis due to something that will happen next episode. And I dare not spoil what.

I also apologize for the shorter chapter today. I didn't want to skimp over the part where the majority of the elements create that memory chandelier for Twilight in the map room, but I honestly didn't want things to be the exact same even with Sunset & Human World Flash there involved in the events.

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