AN: I do not own MLP:FiM or Johnny Test, they belong to their rightful owners
It was an ordinary Saturday in Porkbelly, the sun was shining, birds were chirping, and a certain 10 year old was laying across his bed.
"Ugh..Dukey...so...bored..." he said talking to his dog
"You know Johnny, you could see what your sisters are up to in the lab. It is only 8am, this is early for you since you normally sleep until noon, it will catch them off guard"
He jumped up from the bed "Sounds good to me, Susan and Mary will be shocked, let's go dog!" He jumped up and slid a secret panel on the wall, which revealed a button. he pressed it which moved the cabinet the television was on and there was two tubes. he got in one and Dukey the other and a few seconds later they were in the lab where he spotted them watching something on the large monitor.
"Hey my genius sisters, whatcha watching?" he said as he walked up behind them. SusAn and Mary nearly jumped out of their skin as Mary changed the channel.
"No..nothing Johnny" Susan said as her and Mary spun around as Johnny started snickering. Mary was wearing a purple shirt with a yellow pony with a pink mane and tail surrounded by birds. Susan was wearing a green shirt with a white unicorn that had a purple mane and tail and was surrounded by diamonds.
"Is...is tha-...is that what I think it is?" Johnny said between outbursts of laughter "You..you two watch My Little Pony!?"
Dukey deadpanned as he flipped back to the show "Fluttershy and Rarity...really you two? Everyone knows Applejack is best pony."
Silence filled the room as Johnny's, Susan's, and Mary's mouths all dropped "YOU ARE A BRONY?!" they all said in shock
"Eeyup, I am sugarcube" he said in an Applejack-like manor, "have been fo' awhile now, and afterall, she has a pet dog."
"That doesn't make her best pony, keep in mind Fluttershy trends to all the forest animals." Mary said
"Oh come on, Rarity knows the finer tastes like fashion." Susan added, this sparked an hour long fued between the three of them.
"You know there is a way to settle this.." Johnny said as the got between the three of them
"WHAT!?" the others yelled
"Build some kind of dohicky that will turn you into them and fight it out. While you were busy bickering, the hour long special went off. And I am sure Dukey will have fun as a mare." Johnny said chuckleing as he walked out the room and shutting the door behind him.
"Ok,new plan," Dukey said a little steamed, "he says I am gonna have fun as a mare huh? I say we give him a taste of his own medicine."
"Not to mention he laughed at us for liking the show" Mary added
"He likes sports, so let's build the machine and use him as a test dummy, and I know just the mare to make him into." Susan finished with a chuckle as they got to work. Most of the rest of the day Johnny kept himself busy by playing the new Smash Badger game his dad got him for his birthday. He was on his last life and on the final boss and was charging up his finishing combo when Dukey came barging through the door, making Johnny lose the game.
"What do you want dog?" Johnny asked a little fumed
"Oh nothing much, it is just that Susan and Mary wanted me to get you back to the lab. They said they iust finished that hoverboard you wanted." Johnny failed to notice the sly smile on Dukey's face as he bolted out the door.
"Johnathan, Johnathan, Johnathan," Dukey said with a dark chuckle when Johnny was out of earshot, "you will get the hoverboard, but something tells me you won't be needing it shortly." he finished as he went out of the bedroom and headed for the lab. Meanwhile, Johnny had just entered it.
"Dukey said you got my hoverboard, is that true?" he asked as they were standing a few feet in front of him
"Indeed so," Susan said as she and Mary pulled it out from behind their backs, "Happy Belated Birthday." Johnny's eyes went large as he saw it, it was identical to the design on his shirt, but had 3 cyan lightnig bolts going into the biohazard logo.
"Wow, thanks guys," he said as he spotted something out of the corner of his eye "hey what is that thing?" He said as he walked over to it and pulled back the cover. Underneath was a machine pained solid black with a red lightningbolt down the middle.
"That is the Ponymatic2000 ((I know the name sucks, but it is the only thing I could come up with)). It is what is going to turn me, Susan, and Mary into ponies for the fight. Do you like speed Johnny?"
"Duh, why?"
"You will see why..."Mary said as she turned on the control panel and openned the module as Dukey snuck up behind Johnny and shoved him in, causing the door to automatically shut.
"What the? Let me out of here now!"
"You are gonna have fun...Dash." Susan said as Mary flipped the switch, lighting up the inside of the machine and zapping Johnny with electricity. When it died down, the door opened and he came out normal.
"I am normal, the machine didn't wor-" he stopped as he started screaming, his body feeling like it was on fire from the inside out. He suddenly shrunk, making him slide out of his clothes as cyan fur covered his body. A loud snap was heard as his spine shifted, making him quadpedial as a rainbow tail erupted from his tailbone and his hair grew and changed to match the tail. The screams hightened in pitch as his Adam's apple disappeared and his vocal cords became feminine. His fingers shrunk into his palm as it changed into a hoof and his feet became hooves as well. His muscles, skeletal system, and body fat all changed, giving him a rounded but sleek look as his face pushed out into a rounded muzzle. His eyes grew in size and changed color, becoming magenta. His back arched as a pair of strong wings erupted from his back and a tri-colored lightning bolt appeared on his flanks. Then the final phase began, he started vomiting as his boyhood receeded inside him, his organs shifted to make room for her new ovaries as her vagina formed on her rear above the butthole. A few minutes later, the new pegasus finally spoke.
"Sisters...wha-...what have you done to me?" was all she could say before she passed out from the physical drain she just experienced.
