Splosion, not explosion
"Oh my gosh darn goodness Rainbow Dash, that sure was a cool trick!" cried Scootaloo as she watched her heroine fly around in circles like an idiot.
Rainbow Dash just waved at Scootaloo, not even able to stomach looking at the abomination that lingered below. As much as she loved to be admired by her peers, Rainbow Dash had a big part of her brain dedicated to loathing Scootaloo.
It certainly wasn't Scootaloo's fault, she was just a disgusting, freakish mutant, and had been since birth. While the other pegasus plant ponies flew around, close to the sun, soaking up rays in a stunning display of mass photosynthesis, poor little Scootaloo was stuck on the ground, thanks to her underdeveloped, misshapen back-flowers. As a result of her grounded form, Scootaloo had overgrown pony roots that dug into the ground every time she planted her hooves on the ground.
Despite Rainbow Dash's disdain for the cripple pony, she truly did feel a small sliver of compassion for the youngster's plight, and as a result would do all of the loopdy-loops Scootaloo asked her to.
"Hey Rainbow Dash, do you think you could help me try to fly again?" Scootaloo asked with her irresistible puppy-dog eyes.
Rainbow Dash reluctantly complied, picking Scootaloo up and soaring into the air, instructing the mutilated filly to flap her flowers quickly, but with a well-kept rhythm. Scootaloo kept a bee's pace, flapping furiously as she soared through the air, guided by her mentor and role-model. The load on Rainbow Dash began to lighten as Scootaloo began to hover a bit, continuing until there was virtually no weight at all.
"Alright, Scootaloo, no matter what happens, I want you to keep flapping those wings of yours."
Scootaloo nodded, giving a sideways glance to Rainbow Dash.
Slowly but surely, Dash softened her grip on Scootaloo, slowing down at the same time, as Scootaloo slid out of Dash's grip, she flapped her wings exactly as instructed, and rather than plummet down to her early death, she drifted down like a dandelion seed, landing lightly on the ground.
Rainbow Dash joined her on the ground, only to be assaulted by a gigantic hug.
"Oh thank you Rainbow Dash, that was amazing!"
"Gah, get off of me you mutant freak!" Dash screamed as she pushed Scootaloo off of her.
Once she saw the look on Scootaloo's face she realized what she had just said.
"Oh Scootaloo I-"
"I thought you were different," sobbed Scootaloo before turning around and running home.
As she ran, Scootaloo could faintly pick up the sounds of people calling her a freak, a failure, disgusting mutant, and each insult dug into the emotion center of her brain like a hot spike, only increasing the flow of tears from her weird plant ducts.
Once she reached her home, Scootaloo stepped inside and slammed the door behind her, running to her pod to cry until she stopped hurting. Every time a tear fell into her pod, her roots sucked it up, perpetually re-hydrating the tiny plant-mare. She wished she had parents like the made-of-meat griffons who lived next door, but she had none, noponyplant did. She technically had a mother, as well as hundreds of thousands of brothers, sisters, and non-gendered pods still waiting to hatch, but she would almost certainly never know them.
The pegasus pony plants tend to send their seeds floating along on a wind current, allowing the younglings to grow up together, given a natural feeling of kinship, but as she was floating along with her various family members, a small gust had sent her careening away from the swarm of spores and drifting towards Ponyville, where she was met with hateful glares, and only given an education because it was legally mandatory.
Even Sweetie Belle and Applebloom, whom she had thought to be her closest friends, deserted her after getting their cutie marks, leaving her to deal with the antagonizing of Diamond Tiara and Silver Spoon.
The more she thought about it, the more Scootaloo cried, further emotionally and physically exhausting herself to the point where she went to sleep simply out of obligation to her fatigue.
Scootaloo's eyes shot open, brought out of her stupor by a loud bang. She swiftly ran outside to investigate, only to be hit in the face by spores, petals, and limbs. Once the dust and gore cleared, Scootaloo was greeted by a horrible sight.
Everywhere she looked ponies were inflating and exploding, showering the town with blood and petals.
Through the cloud of spores and petal dust, Scootaloo saw a faint glow, slowly getting brighter and brighter. As the glow grew, the sound of clopping hooves escalated in volume.
"Scootaloo what are you doing?" cried a slightly bloated Twilight Sparkle from inside of her glowing bubble shield.
"Twilight what's going on?"
"Presumably an oxygen bomb. Those damn changelings are trying to pollute our precious carbon dioxide!" Twilight looked Scootaloo up and down. "why haven't you exploded yet?"
"I don't really know..."said Scootaloo,"do you think I'm a-"
"Changeling? Unlikely, no changeling would be stupid enough to attack while spores are saturating the air, they'd melt into delicious bug goop in mere seconds. I'm guessing that you have some sort of mutation that allows you to utilize oxygen as fuel or something."
They hustled loyaltyed and respected their way to Twilight's treecastle.
"Whoa," said Twilight as she read her science device."not only do you use oxygen, but you give off carbon dioxide as a biproduct. Your freaky mutation will save all of ponyplantkind."
So they cut up Scootaloo into tiny pieces and turned them into gas masks, and the gas mask that was part of her butt got a little O2 cutie mark.
the end