Slowly, you the evil human, walked up the steps of Canterlot castle, while dressed in a black hooded robe. You were going full-blown evil edgelord today. Today was the day you were going to ruin Shining Armor’s and Princess Cadance’s wedding for no raisin. The city of Canterlot was not in good shape. They had just recently been attacked by the Changelings. The day appeared to be saved, but they didn't expect you, a Dark Butt Side User. You were more powerful than both the Sith and the Jedi. You knew the true nature of the Force. It was in the butt.
Two Royal Guards ponies approached you with their spears pointing at you. With lightning-like reflexes, you leaped into the air and performed an insane twirly wurly in mid-air while screaming your best Emperor Palpatine impression. Before they could react, you landed behind the two and scratched both of the back of their ears with your hands. The two stallions’ massive cocks twitched, and they uttered a loud whinny of pure bliss as they ejaculated upon the steps below. Their legs became shaky from the relentless ear scratches you gave them. Their legs soon gave way and they fell down upon their own cum in a heap.
With the guards dispatched you simply walked through the golden doors, and made your way inside the castle. The wedding guests gasped at the sight of you entering the throne room. The Royal Guards, and wedding guests rushed to attack you, but again, you leaped into the air, and jumped erratically around the room, all the while screaming like Darth Sidious.
As you jumped about you slapped big fat pony butts, making them whinny, and moan in bliss from your slaps. The sounds of flesh, slapping against flesh could be heard echoing throughout the room as ponies’ fat asscheeks smacked together from the hard impacts of your slaps on their rears.
Your slapped victims soon began to frantically masturbate, grinding their hooves against their marehoods. In a stallion’s case, they wrapped their surprisingly flexible hooves around their stallionhoods, from there they began to jerk off.
Once the majority of the wedding guests and guards were subdued by your hands. You rushed towards the bride Princess Cadance, and with a rough shove, you knocked her over onto her back with her legs in the air. You then went in for the kill and began to stroke her belly with both of your hands, the mare cried out helplessly, moaning in bliss, and making loud horsey sounds.
“Unlimited pooowwwweeerrrrrr!” you roared.
Shining rushed towards you and made to stomp his front hooves down upon you. However, with your godlike reflexes, you reached up your left hand to stroke the back of his ear. The stallion subsequently collapsed on the floor in a heap next to you. Using your advanced knowledge of the Dark Butt Side of the Force, you flipped Shining onto his back with a wave of your hand and exposed his mighty stallion hood standing tall and proud into the air.
Forthwith, you began to stroke his massive cock. Your left hand barely managed to take hold of his godlike thick horse cock. The stallion moaned and neighed helplessly. While still giving him a handjob, you turned your attention back to Princess Cadance.
Lovingly your hand stroked her belly back and forth. The mare was a helpless mess, orgasm after orgasm rocked her form as her legs kicked weakly into the air. Her thick, white creamy cum soaked the red-carpeted floor underneath her. With a nasty grin, you lowered your hand down further and began to stroke her teats. The mare squeaked from the wonderful feeling of your hand stroking her two sensitive nipples.
“Only through me can you get a truly big fat pony butt,” you said in a deep, evil voice.
“Yes, my love Anon. I submit myself to your teachings. Just help save my husband’s life, I can’t live without him.”
“Good. Goooooooooood,” you burped loudly. “The butt is strong with you. A powerful big booty princess you will become. You may even get a bigger butt than Princess Celestia,” from hearing this, Princess Celestia simply growled angrily and crossed her hooves.
“What must I do, master?” said Princess Cadance.
“You must make by Royal Decree that healthy eating is bad for you. Every restaurant must be replaced by Hayburger. Even the lowest fat burger must have at least 1000 calories. Only then will you be big and strong enough with a butt fat enough to save your husband's life from certain death.” Twilight Sparkle made a sound like a dog’s chew toy in happiness from hearing this.
“What about the dietitians? Surely they will object to this fast food expansion.”
“Their betrayal will be dealt with. Send out the Royal Guard to the Wonderbolts Academy. Force feed Spitfire and other Wonderbolts with burgers until they turn to the Dark Butt Side of the Force. The Dietitian resistance will be then crushed in one fell swoop! And once more the big fat pony butt will rule Equestria.”
“It will be done, my lord.”
You pulled your hand away from Cadance. Your apprentice then made to stand up on her four hooves. She embraced the Dark Butt Side of the Force, and subsequently, she began to grow larger, inching up into the air. Thunderous meaty slapping sounds of flesh slapping against flesh could be heard echoing throughout the room as her buttcheeks clapped together.
Cadence's wedding dress began to rip and tear from her growing rump pushing against it. At the same time, her golden regalia started to creak and groan from the expanding pressure of her growing body. Before her strong growth spurt had come to a stop, her necklace finally shattered, falling off of her neck in several pieces, before being ground to dust under her hooves mighty weight. The massive pink alicorn now towered over everypony at her wedding, looming over them like an African elephant with a pair of supermassive beachball-like sized asscheeks. Her torn wedding dress became a distant memory as it lay beneath her mighty hooves.
“Thank you, my master,” she simply said in a low voice as a single tear fell down her cheek.
“That’s going to be one hell of an ass to fuck at my honeymoon,” said Shining Armor in a low nervous voice as he lay beneath the shadow of his massive wife’s ass looming over him.