Twilight Sparkle found herself in a cave filled with millions of shiny crystals. When she fell down, she was out of it for a bit but soon came around. She remembers what had happened a few minutes ago. She declared that her old foalsitter, Princess Cadence was evil, she was shouted at by her brother, Shining Armour, her friends and mentor left her, and then was pulled underground by green flames created by Cadence.

“Huh? Where am I?” Twilight nervously asked herself, as she looked around, “Hello? Is anyone there?” but only her echo came back.

Suddenly she saw Princess Cadence on every crystal glaring at her with her eyes a poisonous green.

“The caves beneath Canterlot, once home to greedy unicorns who wanted to claim the gems that could be found inside,” Cadence said evilly, “And now, your prison.”

“What!?!?” Twilight said, before crying out for help, “Help! Help!”

“It's no use. No one can hear you. And no one will ever think to look for you, either,” Cadence laughed evilly, “Most ponies have forgotten that these caves even exist, which is why they are the ideal place to keep the ones who try to interfere with my plans.”

“Plans!? What plans!?” Twilight asked in a shocked tone.

“The plans I have for your brother, of course,” she replied wickedly, “Oh and you son as well”.

“Don't you DARE do anything to my brother and my son, you... you monster!” Twilight demanded angerly.

“Only way to stop me is to catch me!” Cadence laughed before moving from crystal to crystal. Twilight tried blasting her with her magic, but the blasts bounced off the crystals and almost hurt Twilight multiple times. All the while Cadence would taunted her and laugh at how she missed.

“Alright that does it!” Twilight shouted as she charged up her magic and fired it at a rather large crystal, destroying it. And on the other side of that crystal, sat Princess Cadence. Twilight Charged at her.

“No! Wait! Ugh!” She called out as Twilight tackled her to the ground, “Please! Don't hurt me! Twilight, it's me! Please, you have to believe me. I've been imprisoned like you. The Cadence who brought you down here was an imposter.”

“Likely story!” Twilight said, clearly not believing her.

Cadence got up and did the dance she and Twilight would do when they were younger, “Sunshine, sunshine, ladybugs awake. Clap your hooves...”

Suddenly, Twilight Sparkle realized why she did that, and she finished off the little rhyme, “...and do a little shake.”

Twilight ran up and embrace her real foalsitter, “you remember me”, she said with tears leaking from her eyes.

“Of course I do”, Cadence replied with tears of her own, “How could I forget the filly I love to sit for the most?”

Suddenly they both could hear sounds. They sounded like drilling or something. Then a wall busted open revealing a cloud of dust. Once the dust cleared, they saw a worn-like creature with arms and legs.

“Twilight!” the creature said. Twilight took one look at the chest and saw the Omnitrix, she then knew that this monster was Sam.

“Sam!” She called out as Sam got closer to them, “how did you find us?”

“Telesdon has great tacking skills”, Sam said, he then notice Cadence hugging Twilight. “I guess you’re Princess Cadence,” he asked.

“Yes I am,” She replied, “and I guess you’re Sam Metters, Twilight’s adoptive son and Hero of Monsters”.

“Hero of Monsters,” Sam mimicked, “I like the sound of that”.

Suddenly, they all heard some sinister evil laughing echoing through the caves.

“We have to get out of here”, Twilight stated, “We have to stop her! Sam do you think you find a way out?”

“You bet, follow me”, Sam/Telesdon called as he began running down a path.

They all ran through the caves to find the exit to stop the mysterious imposter.

Meanwhile, In the main hall, the whole room was full with many guests and with the organ playing the music.

“Guys, where’s Sam?” Sonata whispered.

“I don’t know, sis,” Aria replied, “But where’s Twilight too?”

“What if they’re both right?” Rainbow Dash asked them in a hush voice.

“What do you mean, my darling?” Rarity asked back.

“What if Sam and Twilight we’re both right about this whole thing. I’m starting to think the same thing they’re suspecting.” Rainbow replied.

“Wow, Rainbow you’re a smart pony, why don’t you figure that yourself”, Sunset snapped at them.

“Mares and gentle colts, we are gathered here today to witness the union of Princess Mi Amore Cadenza and Shining Armor,” Celestia said before starting up the ceremony.

Meanwhile from outside the room, Sam, Twilight and Cadence arrived at the door and could hear the chatter from Princess Celestia.

“Oh, we're never going to save him...” Cadence said worried that they won’t be able to save Shining Armour.

“Just leave it to me”, Sam said before running to the end of the hallway. “Stand back”, he shout before running and jumped into a drill position, “Drill Formation Attack!”.

“Princess Cadence and Shining Armor, it is my great pleasure to pronounce you...” Celestia was about pronounce that Cadence and Shining were husband and wife until…

“STOP!!!!” Called a voice as a drill-like creature busted through the doors. “Now that’s you make an entrance”.

The entire crowd all turned and saw Sam as a monster, Twilight Sparkle and the real Princess Cadence.

“Ugh! Why does those two have to be so possessive of Twilight’s brother!?” Fake Cadence said before trying to pretend that she was upset, “Why does she have to ruin my special day?”

“Because it's not YOUR special day! It's MINE!!!” Real Cadence remarked.

The entire crowd all gasped in surprise and confusing. There were two Cadence’s.

“Ah... ah’ don't understand. How can there be two of 'em?” Applejack questioned, just as confused as everyone else.
“She's a changeling. She takes the form of somepony you love and gains power by feeding off your love for them!” Cadence told everyone.

Then suddenly, the green fire crackled around the fake Princess Cadence and disappeared to reveal a black pony with a crooked horn and was known by the name of Queen Chrysalis. The entire crowd all gasped in surprise and shock again.

“Right you are, Princess. And as queen of the changelings, it is up to me to find food for my subjects,” Chrysalis laughed evilly, “Equestria has more love than any place I've ever encountered. My fellow changelings will be able to devour so much of it that we will gain more power than we have ever dreamed of!”

“They'll never get the chance! Shining Armor's protection spell will keep them from ever even reaching us!” Cadence said.
“Oh, I doubt that. Isn't that right, dear?” Chrysalis chuckled as she used her magic to make Shining nod his head. “Ah, ah, ah. Don't want to go back to the caves, now do you? Ever since I took your place, I've been feeding off Shining Armor's love for you. Every moment he grows weaker and so does his spell. He may not be my husband, but he is under my total control now!”

Sam (who had turned back to normal), Twilight and Cadence all gasped.

“And I'm sorry to say, unable to perform his duties as captain of the Royal Guard.” Chrysalis laughed again.
“Not my Shining Armour!” Cadence called out.

“Soon, my changeling army will break through. First, we take Canterlot. And then, all of Equestria!” Chrysalis laughed louder. By this point, Sam had, had enough of this and using the Omnitrix, turned into a brown dinosaur-like monster.

“GOMORA!!!” he roared before going on a rant. “HOW DARE YOU!!!!! HOW DARE YOU COME TO EQUESTRIA, DISGUISE YOURSELF AS CADENCE, MADE TWILIGHT’S BROTHER BLAME US AND TO TRY AND STEAL HIM FROM CADENCE AND FOR RUINING THE WEDDING!!!!!!! I HAVE HAD ENOUGH OF YOU’RE TROUBLE MAKING YOU STUPID EXCUSE FOR A QUEEN!!!!!!!!! I WOULD LOVE TO SEE YOU LEAVE EQUESTRIA PERMANATLY!!!!!!!!!!”

Everypony in the room all gasped in shock and surprise at Sam’s angry words.

“Sam…” Twilight and Cadence said in worry.

“Whoa..!” Adagio said, shocked.

“Oh dear..! Sam’s dark side is making me scared of him..!” Fluttershy nervously responded.

“That was his dark side?” Pinkie Pie remarked.

“WHAT!?!?!?!? HOW DARE YOU SPEAK TO ME LIKE THAT, BOY!!!!!” Chrysalis shouted, “If you want to ruin my special day of taking over Equestria and wanted to stop me, then let me make amends by... SUMMONING MY MAGIC AND SQUASH YOU LIKE THE INSIGNIFICANT BUG THAT YOU ARE!!!!!!!!!!!!!!”

She used her magic from her horn and shot at the chandelier from the ceiling which broke and fell down straight towards Sam/Gomora who was standing underneath it which made the whole crowd scream in sheer terror.

“SAM!!!” everyone screamed at the top of their voices. But Gomora didn’t faze him. Just before the chandelier could crash down on his head. Gomora caught it before ripping it in two and throwing the two halves to the ground.

“WHAT!?!?!? IMPOSSIBLE!!!!!!!!!” Chrysalis yelled.

“Twilight get your brother and get him to safety and Cadence and get the girls to take the guests to safety! I’ll handle things here!” Sam said getting in a battle pose.

“What!? NO! Sam, that’s crazy! I can’t let you fight her! Not on your own!” Twilight argued.

“Twilight I can handle this”, Sam told her. Twilight looked in his eyes she could see that Sam wanted, no needed to take down the Changeling Queen. She nodded and ran up to Shining.

So Twilight and Princess Cadence got the Mane Ten and Shining Armour to safety and made a dash out of the room leaving Sam/Gomora to fight off Queen Chrysalis.

“GRRRR!!! Very well then!” Chrysalis said before shouting out, “CHALLENGING PACK!!! BEGIN OUR ASSAULT!!!!!”

Then nine changelings came up and surrounded Sam making it a very uneven match of ten vs one. The changelings all pounced on Gomora. But they were all taken care quickly, Gomora jumped making all the changelings fly into each other. When they got their bearings, Gomora then grabbed one by the head and threw him into another sending both out the window. A third tried to grab his tail but Gomora threw him into a wall, knocking him out. A four, five and sixth tried a head-on attack, but Gomora kicked one, breaking its jaw, punched another, giving it a black eye, and slammed his crested horns into the last one, shattering some of its ribs. The last three tried pouncing again but Gomora finished them off by swinging his mega-ton tail into all three. In less than two minutes the nine changeling drones were out of the battle.

“Nine down,” Gomora proudly growled, “one to go.”

“Very well then, boy,” Chrysalis snarled, “You will pay dearly for ruining my plans and I am never gonna let you ruin them again while it’s in motion! And if there’s another thing I hate more... its interference from you!”

“Come on, Chrysalis! I heard that lame speech a hundred times before!” Gomora taunted, “I don’t care what you say and what you’re gonna do to Canterlot! So do me this favour: LET’S REALLY FINISH IT OFF, ONCE AND FOR ALL TIME!!!!!”
“Alright, your death wish”, Chrysalis said.

Gomora charged towards her and tried to kick her, but she blocked her attack with her leg, but Gomora managed to kick her in the stomach.

“GARGH! Lucky, kick, boy!” Chrysalis remarked, “But you’re luck just ran out!”

She used the horn from her magic and threw Gomora in the air and she flew up and kicked Gomora which sent him bumping down on the ground. Gomora roared in pain, he was a terra monster, he wasn’t used to be in the air. Then Queen Chrysalis used her magic to throw some crystals at Gomora, but he dodged them and charged towards her and slammed his head into her in the face. Then they charged at each other again and kept punching each other’s hooves to claws trying to punch their faces, but Gomora kicked her again in the stomach and then gave her twenty fast punching blows which sent her flying towards a pillar. Just as Chrysalis was getting up, Gomora saw a chance. He ran up and impaled Chrysalis with his nasal horn. Then Twilight, Fluttershy, Pinkie Pie, Applejack, Rarity, Rainbow Dash, Sunset, Adagio, Aria and Sonata along with Cadence and Shining Armour that just broke from his trance came back into the room carrying the shiny objects called 'The Elements of Harmony' just as Chrysalis let out a scream of pain.

“Super Oscillatory Wave Zero Shoot!” Gomora roared as he fired his attack inside her. Visible waves of energy could be seen surging throughout Chrysalis body, with some mini blasted shooting out the holes in her hooves and horn. Soon Gomora stopped, complete silences fell all that could be heard was the raspy breathing of Queen Chrysalis.

Gomora walked up to the balcony, with chrysalis still on his horn. Gomora turned his head and whipped it forward sending Chrysalis flying as his horns started glowing again.

“Super Oscillatory Wave!” Gomora roared again firing a concentrated wave of energy right at Chrysalis. The attack smashed into her, sending her all the way to the Changeling hive.

“NO!!!!” Chrysalis cries one last time before colliding with her hive destroying it in one big explosion.

“Whew!” Gomora sighed with relief, “I think I got a headache now!”

Twilight broke her trance and ran up to Celestia who didn’t have enough time to get out.

“Don't worry about me. I'm fine,” Celestia said as she struggled to get up, “You have a real wedding to put together.”

And so, everything was restored and everyone in the big room all got in their places again with Sam (now back to normal) and Twilight are in their best wedding clothes and were standing to be Shining Amour’s best colt and mare. Then the big doors open to reveal the real Princess Cadence in her beautiful wedding dress and the birds sang the Bridal Chorus as she walked down the red carpet.

“Seriously, though,” Twilight said as she sorted out Shining’s suit, “I get why the queen of the changelings wanted to be with you, but how did you get someone as amazing as Cadence to marry you?”

“I told her she wouldn't just be gaining a husband. She'd be getting a pretty great sister, too”, he replied.

Twilight and Sam smiled and understood as Princess Cadence arrived and stood next to Shining Armor as Princess Celestia made the announcement.

“Mares and gentlecolts,” Celestia began, “we are gathered here today to celebrate the union of the REAL Princess Mi Amore Cadenza...”

“Princess Cadence is fine,” the pink alicorn remarked.

“Alright,” Celestia continued, “The union of Princess Cadence and Shining Armour. The strength of their commitment is clear. The power of their love... undeniable. May we have the rings please? I now pronounce you mare and colt.”

The entire crowd all cheered as well as Sam, twilight and the Mane Ten.

“This is his victory as much as ours,” Celestia said, “but we should also thank our brave hero for saving this wedding. Sam Metters.”

“Thank you, you’re majesty,” Sam bowed in respect. This caused Twilight to giggle slightly.

“You persisted in the face of doubt, and your actions led to your being able to bring the real Princess Cadence back to us. Learning to trust your instincts is a valuable lesson to learn.” Celestia spoke.

Shining Armour and Princess Cadence kissed sweetly.

“Um, Rainbow Dash..? That’s you’re cue now,” Adagio whispered to Rainbow.

“Huh? Oh yeah!” Rainbow said before flying up in the air with a rainbow trailing behind her very fast until it let off a rainbow explosion as the celebration of the wedding began, “BEST... WEDDING... EVER!!!”

Later that evening, everyone was enjoying themselves, dancing to the musical, eating food and catching up with friends. Just then Princess Luna flew down.

“Hello, everypony! Did I miss anything?” she asked.

“Nope! You’re just in time, you’re majesty!” Sonata said.

Twilight nodded something to Pinkie which she squees in return. She rushed off to a DJ booth and somehow pulled Vinyl out of nowhere, “Let’s get this party started!”

“Sam and Twilight both began to sing as they watched everypony having a great time at the party.”

Love is in bloom
A beautiful bride, a handsome groom

Two hearts becoming one
A bond that cannot be undone because

Love is in bloom
A beautiful bride, a handsome groom

I said love is in bloom You're starting a life and making room
For us (for us, for us)

Your special day
We celebrate now, the pony way

Your friends are all right here
Won't let these moments disappear because

Love is in bloom
A beautiful bride, a handsome groom

I said love is in bloom You're starting a life and making room
For us (for us, for us)

“Twilight!” Shining called out, “None of this would've been possible without you, little sis. You and you’re son, Sam. Love ya, L. S. B. F. F.”

“I love you too... B.B.B.F.F.,” Twilight replied in return hugging him tenderly as he hugged her back.

“And Sam... thank you... for saving our wedding,” Cadence said, giving him a kiss on the forehead.

“Heh, heh. Thanks, you’re majesty,” Sam blushed, “So technically now you my aunt”.

“Heh, I guess so”, she chuckled, “oh! I almost forgot!” She got out some flowers and threw them behind her.

“Ooh, ooh, ooh! It’s mine!” Rarity called out as she catches them.

“We are all proud of you, Sam. You have saved all of Equestria once again. I’d knew you would be a valuable children of Twilight the moment I met you.

“Thanks, you’re majesty. But it wasn’t just me that helped save Equestria,” Sam said as Twilight walked up, “Twilight figured something was wrong with Cadence.”

Twilight giggled a bit, “Yeah but you were the first to see that it wasn’t Cadence.”

“Listen, Twilight,” Applejack said as she and the rest walked up, “We’re really sorry we didn’t believe you and Sam.”

“I hope you’re not mad at us like you took you’re anger out on that imposter, are you..?” Fluttershy asked.

“That’s okay, girls,” Twilight said, “Thanks for owning up.”

“Anyway my outburst wasn’t really me,” Sam told them, “Gomora was the one who roared.”

“Still we’re to blame,” Rainbow said looking down casted.

“Come on, Dash cheer up”, Aria said walking up next to her.

“I’m just glad that I was able to defeat Chrysalis,” Sam remarked.

“Well lets hope she gone for good,” Sunset responded.

Meanwhile in a secret base hidden deep in the Everfree Forest someone was work on something. On a table was someone on the edge of death that he helped. And she was now waking up.

“Where… Where am I?” she said weakly, she then saw her saviour, “who are you?”

“Where you are is in my workshop”, said the hidden one, “As for who I am, well you can call me Sinister S”. The figure walked out of the darkness to reveal a man he was wearing a black suit with red and black upper armour. On a belt he wore, he had a black, purple and red Dagger-like device, a purple and dark blue rectangular device, and red ring contraption, and a red and purple claw-like device. He wore a helmet that covered his face, so his identity was hidden.

“Ok, Sinister S,” she replied, “what do you want from me”.

“Just your help to get rid of something”, Sinister S Replied, “I believe we have a common enemy”. He lifted up his left arm to reveal something that was shocking to his captive. On his left hand was a red Omnitrix but instead of on his wrist it acted like a gauntlet covering the hand itself but leaving the fingers out.

“I’m assuming you can guess what the ‘S’ stands for now”, he replied.

His captive was shocked but calmed down, “So what do you want my help for?”

“Maybe one or two things,” Sinister said, “one of them is…” he got closer to her, “Your minions, Chrysalis”.

Chrysalis was shocked to know that this alien knew her name but agreed.

“Good but first you need to be… modified”, Sinister said as another alien walked in.

“Boris, take care of our guest,” Sinister asked before walking out. He walked out of his base into the open night sky, “You’ll be laughing on the other side of your funny bones soon..! Silly ponies..!” He laughed.

Chapter 5 completed. Next time: Sam has a nightmare, he tells his nightmare to Aurora and Scarlet and the three children get pets of their own.