The shiny ampharos bit his lip nervously, constantly glancing at the bedroom door every minute or so. "Are you sure about this?"
"Look, Candy," replied his shiny dragonite friend, "I already said a thousand times: they're gone for the weekend. Nobody's in the house except us, and nobody's coming back until Sunday evening. Nothing is going to interrupt us, all right?" The teenage dragon pokemon, noticing his friend's nervous glances, rolled his eyes. "C'mon, it's locked, okay? Even if there was someone else here - which there isn't - they couldn't come bursting in here, even if they wanted to!"
"Sorry, Contrail," the pink ampharos responded, finally seeming to relax a little. "It's just...well, I've never done this before, okay? I-I want this to be perfect, ya know?" He chewed his lip thoughtfully, adding, "Also, I prefer 'Cotton', if we're using nicknames; you know that."
Contrail pouted his lips into an insincere frown. "Aww, but 'Candy' is so much cuter! It makes you that much girlier!"
"Yeah, as if I wasn't girly enough already," Cotton Candy replied, blushing. "Here I am, a petite-build, pink ampharos, wearing the sissiest diapers in existence, and you go and say I need to be more girly?!"
The electric pokemon looked down at the pink disposable garment, patterened with sparkles and skitties. He pressed down on the front of the puffy diaper with a soft crinkle.
"Heh, in for a penny, in for a pound, eh?" The dragonite chuckled. "Besides, someone has to be the girly guy in this relationship," he said, winking at Cotton Candy. "And someone else has to be the macho guy!" He struck an exaggerated pose.
"Oh, like you're anywhere near macho!" Cotton Candy retorted, pointing at his boyfriend's childish blue padding, dotted with stars. "Yeah, all the other guys on the football team would just be so impressed by how macho that diaper is."  The electric pokemon giggled. "Let's face it, we both turned in our man cards the instant we started wearing these things." He patted his diaper for emphasis.
"Eh, man cards are overrated anyway," Contrail replied, shrugging. "In that case, though, I guess I should say that someone in this relationship has to be the boyish one."
"Ha, can't argue with that!"
They both laughed, then Cotton Candy added quietly, "Y'know, I'm lucky to have found you." A blush erupted on his face.
"Yeah, who'd have thought?" Contrail stared off into space thoughtfully. "Another gay guy, going to the same high school, also into the same...stuff I'm into. Odds must be one in a million, huh?"
"Don't forget," the Ampharos replied "we're both shiny. That makes the rarity of this situation go up exponentially!"
Contrail stared blankly at his friend.
"What?"
"That was incredibly dorky right there."
"Aww, what? No it wasn't! That was just an objective observation. Since we're both - mmm!"
Contrail had popped a white and pink pacifier with a heart on it into his boyfriend's mouth. "Seriously, your science geek side is showing way too strongly there. Better stop talking before - mmph?"
A determined grin on his face, Cotton Candy had reciprocated the other pokemon's gesture by stuffing a white and blue pacifier with a star on it right into the dragonite's mouth. "Heh, howsh zhat?" he mumbled past his own pacifier.
"Oh, sho zhat's how itsh gonna be?" Contrail giggled as he dove down to tackle the ampharos. The two shiny pokemon laughed as they wrestled on the bed, ending up lying next to each other, panting, after a few minutes of roughhousing.
"Hey, Contrail?" Cotton Candy said after pulling the pacifier out of his mouth momentarily.
"Yeah?"
"I gotta poop."
"Well, I gotta pee."
"On three?"
"On three."
They both sat up, getting into better positions for what they were about to do. Cotton Candy put the pacifier back into his mouth, grinning. "One-" he started.
"Two-" Contrail counted off.
"Three!" They both said at the same time as they squatted and started to simultaneously use their diapers.
Contrail relaxed, and instantly a warm stream cascaded out of him, the front of his diaper starting to darken, growing heavy, puffy,and wet very fast. 
Cotton Candy, on the other hand, was having a little bit of trouble. He was squatting and straining, but not much would come out of him, save for the grunting and panting that accompanied his effort.
"Heh, looks like I'm winning," the shiny dragonite said from around his pacifier, the faintly yellowed patch on his diaper simultaneously creeping up the front and filling up the bottom.
The ampharos rolled his eyes and kept pushing. After a few more seconds, a faint crackling sound emanated from his diaper, followed by the full feeling in his bowel slowly moving downward and out of him, and into the seat of his diaper with a soft "squish". A powerful stenched filled the room as more of the firm, warm mass pushed its way into Cotton Candy's diaper, bulging out the bottom of the girly garment with a giant, grapefruit-sized lump. The shiny electric pokemon stopped for a moment to catch his breath, while Contrail waved a claw in front of his face.
"Oh man, what'd you eat?" The dragonite playfully chided before looking back down at his own diaper, his last few drops of pee dripping into it. By now the boyish garment was soaked nearly from front to back, the entire thing puffy, heavy, and slighlty darkened, its wet warmth hugging his bottom gently. "Looks like I'm done," he said, grinning. "And that was with two boosters, too!"
If Cotton Candy heard his friend, he didn't acknowledge him, but merely kept doing his business. It was easier for him to poop now, the softer mess pushing its way out of him and into his diaper with little effort. Though he was straining less now, his face was still slightly flushed, and he still grunted softly as he forced more of his bowel movement out. The warm mush, having filled up the bottom of the diaper, started pushing its way up the back, as well as moving toward the front a little bit, squishing lightly against his balls.
Contrail spat out his pacifier. "Seriously, I need to open a window or something," he said, trying not to gag on the strong smell. He waddled over to the window, his diaper slightly swaying between his legs as me moved. "Whoa!" his eyes bugged out as he got a good view of the sissy ampharos's diaper from the back. "You REALLY had to go, didn't you?"
Cotton Candy pushed for a few more seconds before finally finishing. His diaper was now heavy and sagging, the hot, squishy mess pushing up against his butt pleasantly. Before standing up he smiled in relief as he let out a small rush of pee into his diaper, the front growing a little warm, wet, and puffy in its own right as the stream quickly moved down, creating a slightly yellowed patch all along the front of the pink diaper. Upon finishing, the shiny ampharos stood up as best as he could, the thick, squishy bulk around his bottom bowing his legs outwards slightly.  
"You may have finished first," he said, pulling the pacifier out of his mouth, "but I definitely win the prize for 'most used diaper'!" he said, grinning.
Contrail merely nodded in agreement, a large bulge forming in the front of his own heavily used padding.
"Ooh, what have we here?" Cotton Candy said teasingly as he waddled over to his dragon friend and playfully poked the tent in his padding.
"Oh, I don't know," the dragonite responded, a smirk forming on his now flushed face, "probably the same thing that we have HERE!" he pressed a clawed hand to a similar bulge in the front of his friend's diaper as he said this.
"Eep!" Cotton Candy blushed as the tent in his diaper flexed. "H-hey, no fair!" he stammered, letting out a giggle toward the end. 
Both dragons stared lovingly at each other for a moment, sharing a knowing look before simultaneously moving together and hugging each other, pressing the warm, squishy bulges tenting out their puffy, heavy diapers into each other. The two pokemon gasped almost simultaneously, their rock-hard shafts flexing again at the contact.
Contrail gently pushed Cotton Candy back down into a sitting position on the bed, the sissy dragon's diaper squishing as he did. The dragonite once again moved close to the ampharos, grabbing his shoulders as he pressed his diapered erection against his friend's. With a quiet moan he started to hump, pushing the full weight of his incredibly soaked boyish diaper against the pink, puffy crotch of the other dragon's diaper.
Cotton Candy leaned back, resting on his elbows as he let his boyfriend hump him; these rigorous movements, along with the warm, sticky mess squishing up against his butt, was causing the shiny electric pokemon's penis to throb more and more, his heart beating faster as his body yearned for release.
As the green dragon continued humping, his own member throbbed ever faster, each passing movement of diaper against diaper bringing him closer to releasing into his own warm, wet padding.
Contrail's repeated thrusting of his squishy padding finally became too much for Cotton Candy to bear, and with a flushed face and a loving smile up at his partner, the pink ampharos came, his throbbing, hard penis shooting an explosion of sticky white goo into his messy diaper. "Mmmmm," he moaned in pure ectasy.
His boyfriend's orgasm was enough to get Contrail going, too, and with one more push a hot eruption of seed spurted into his own soaked diaper. "Ohhhh," he groaned as he returned Cotton Candy's smile, his face equally hot with his blushing.
As they both continued to ejaculate, Cotton Candy pulled Contrail down into a hug, firmly kissing him on the lips. The dragonite reciprocated, even pushing his tongue into the other dragon's mouth, eliciting an approving moan from the other.
They lay there a while, hugging and kissing even after the last few dribbles of cum finished squirting into their diapers. They enjoyed each other's warmth and company, and eventually slipped into a quiet afternoon nap, the perfect end to a perfect day.