Twilight left the Castle to find Gem, until she finally found him at the Boutique.
"Hello Twilight, what brings you at this ho..."
"Where's Gem?"
"He's sleeping, my son sure sleeps like an angel doesn't he?"
"...H-how'd you..."
"You really think I wouldn't notice my own fabulous face genes?"
"Wow..."
"So what's the problem?"
"Spike & Chrysalis have fallen in love! Now in the future, Princess Exoskeleton their daughter will come to his version of the future & destroy everything!"
"That is certainly unfortunate...what are we going to do now?"
"I...don't know!"
"We'll figure something out tomorrow...now go get some sleep."
"Okay Rarity..."
Meanwhile...
*Zap!* *Bzz* *Flash!*
"Okay minions get ready for an attack, so wait for my orders!"
"Yes master!"
The next day came...it was 6:30 PM and Chrysalis & Spike are going to reveal their love for each other.
"Friends...we're dating!"
Then the mane 6 & Gem were clapping awkwardly because they's have to break these 2 up somehow but that's when...
"GEEEEEEEEEEEEM COME OUT!!!"
"(Oh shit she followed me!)"
"What's that?" Spike asked.
"I sounds like a changeling princess. Only a changeling princess has a shriek that shrill." Chrysalis explained.
"(Of course!)" The rest thought. They all then exited the building and where shocked to see a large army of Changelings.
"Hello Gem...now if you just come here, I'll kill you swiftly and painfully!"
"Hell no!"
"What's going on here?" Spike asked. "I demand an answer now!"
"Hi mommy & daddy, I'm your evil daughter from the future. I'm just her to extinguish the last symbol of love left! Gem!"
"..." They then looked at each other.
"Spike, I swear I had no idea!"
"Now's not the time for stupid comments, now's the time to protect Gem!" Twilight told them.
"...No!"
"What?"
"I said no, it's time for me to stop running, I wanted to stop Princess Exo's birth, but now that's too late seeing that Chrysalis & dad are in love!"
"D-dad?"
"Yeah, you're my dad & Rarity is my mom from an alternate version of the future!"
"We were trying to keep this secret, but guess the cat's outta the bag now!"
"Wow, that's quite a twist!"
"Shut-up the lot of you, so Gem, do you intend to just surrender and die, or do all of your friends have to die as well?"
"NO! Shogun Deezutra believed in me! Plus, I refuse to let you win! You killed my beloved Glitter Sparkle! Princess Exoskeleton, you will not be allowed to live!"
Then music began playing out of nowhere!
"What is that music?"
"Hello, I'm Trahzo, the author of this story, and for the final showdown...is a rap battle!"
"What?" They all said in confusion.
Then a wall of psychic energy cut Trahzo, Gem & Exo off from everyone.
"Ooooh, Epic Showdown Rap Battles! Gem, the son of Spike & Rarity vs. Exo, the daughter of Spike Chrysalis, begin!"
Exo:
"What, you really think you stand a chance against me?
Why don't you go get stung by bees?
Gem, how can you win this battle even though you can't even fight?
Too me, you're nothing but shite!
Don't be sad, after this little kerfuffle,
I'll bury you with that lesbian spawn you love so much Glitter Sparkle!"
Gem:
"You don't even look like a threat!
You're more of a Gothic wreck!
I ain't scared of you anymore, so you should be shivering!
Also, you're pretty ugly for a changeling!
I'm not trying to be racist but no wonder dragons never breed with your kind.
Because after sex, there will be nothing of you left behind!"
Exo:
"You impudent foolish kirin,
I'll have the future that's clean.
No more love if I cannot have any.
The fans love you as much as Flash Sentry."
Then energy started building-up
"It's so sad you couldn't keep up.
To be honest, you fought as hard a newborn pup!"
Then a burst of energy blew up in Gem's face! Gem was struggling to stand-up, the cries for her friends to not lose wasn't helping, but that's when a claw was offered to help him up!
"Hey, don't give-up so easily, are you sure you're one of Spike's children?"
"Huh? wh-who are you?"
"Name's Emerald Flame, the son Twilight & Spike, I come from another version Exo's reality."
"What? I thought I killed you!"
"You thought the same thing for the others!"
Then Spike's fan children drawn by TaliZimInvader all began exiting from a temporal portal! Fluttershy's daughters: Animal Call & Soft Talon, Applejack's daughter: Honey Crisp, Rarity's daughter: Garnet Bleu, Pinkie's Daughter: Shindig, Rainbow Dash's daughter: Spectral Blaze, Applebloom's daughter: Apple Leaf, Scootaloo's daughter: Agile, Sweetie Belle's Daughter: Allegro, Zecora's son: Legion, Trixie's Daughter: ...well she was never given a name, so let's go with Jynx, Gilda's son: Feather Scales, Princess Celestia's daughter: Ascension, Luna's daughter: Pandora, and finally...wait, Cadence's daughter: Crystal Heart? Oi vey, I guess Shining Armor & Cadence got a divorce.
"Holy shit, that's a-lot of possibilities!"
"Ooh, ooh! My Daughter is the cutest! Now I wanna have a baby with Spike!"
"Back off Pinkie Pie! He's mine!" hissed Chrysalis.
"Well, I for one actually think moi would make a great wife, look, our children though not from the same world are much more good looking than all of the rest!" commented Rarity.
"Would you all stop fighting...over...Spike..." Then Twilight got an idea in her head.
"You guys really came to save me?"
"Yeah, Deezutra sent us!"
"Now here, take some of our energy!" Then a super mini compacted spirit bomb was put on top of Gem's horn. Then Gem absorbed the energy & regained full health.
"Now let's end this rap battle!"
"Damn! You got back-up!"
"Shut it Exo it's not even your turn,
I'm part dragon which means you're gonna feel the burn!
Like my dad, I'm loved by everypony!
No one will remember you after this yah phony!"
Then an even stronger build-up energy began charging.
"Meeting everyone of my alternate world siblings besides you has been an honor!
but you? It feels like going to school in the summer!"
Then an explosion happened sending all of Exo's minions back to the future!
"Nooooooooooo!"
*Flash!*
Then my wall of psychic energy went down & the music topped. Then everyone started telling Gem how brave, awesome, and whatever else he was.
"We did it! But she'll be back." Then Gem started sulking.
"Hey don't feel bad, we'll find a way." said simultaneously by Twilight & Emerald Flame.
"Hmph, I bet you already have the answer do you?"
"You really are my son."
"What are you 2 talking about?"
"Just wait and see kid, it'll be a surprise ending." I told Gem. "So Pinkie, now that all of the craziness is over, Pinkie, what time is it?"
"Adventure Time?"
"No you dolt, party time!"
"Ooooh, silly filly me!"
So they all had a big party to celebrate then after it ended they all said their goodbyes & the temporal portal re-opened with Shogun Deezutra waiting to pick-up all the fan offspring & return them to their realities. Then Deezutra & I exchanged glares!
"We will finish our showdown another time!"
"You bet your ass, I'll see you in the 4th Pimp Spike's Swag which is where you'll eventually die!"
Then all the fan offspring left through the portal with Deezutra.
Weeks later...
"Glad you're here Spike."
"Hey Twilight, what's everyone doing here?"
"Well I just got a brilliant idea."
"What would that be?"
"That we merged all of those future realities together!"
"What? But why?"
"Don't worry honey, it's more of just insurance that if Exo goes crazy again, we can rest assured her half siblings can stop her again!" Chrysalis explained.
"...If you say so."
"He agreed girls, now come-on, get him!"
Then they all pounced on Spike, going into a complete & utterly destructive orgy.
The End.