Nick awoke in the middle of the night with a cold sensation around his nethers. "Darn it," he said to himself as he flipped over the blanket to reveal his soaked sheets beneath his wet diaper. Thankfully for the sixteen-year-old Riolu, he had plastic sheets fitted to his bed. This was something that had been happening with increasing frequency lately.

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	It had been a month and a half since his younger cousin Tyler had played a prank on him, switching his six-year-old brother's markings with his. The pair swapped places for a full month, with Nick playing the part of his bedwetting little brother and Nick playing the part of the responsible older brother. It was a game that Kevin had apparently always wanted to play and that Tyler indulged with the help of a little blackmail on the older Riolu. The dye had since faded, but there were some fallout from the time that they spent switched.

	For one, his little brother Kevin had completed his potty training right around the end of that month. The whole reason that the bed came fitted with plastic sheets was because while they were swapped for that month, he'd wet the bed nearly every night. You couldn't simply become potty-trained overnight. The last week of that month, he'd finally managed to stay dry, and that streak continued until the current day with Kevin not having a single accident since, day or night.

	For Nick, he'd grown accustomed to wetting his diaper every day and night since it was what his brother did. He talked with his brother about starting potty training and physical training for fights, so that he could continue on that tradition when they swapped back, but he wasn't supposed to be very good at it, so he held back at both activities, only occasionally using the potty correctly or performing what was required of him during gym meets for his age group.

	The whole process had been pretty humiliating for Nick. He was given a clean slate at the end of the month and could've put the bedwetting behind him, writing it off as something that had happened as a result of his cousin's trick. Instead, he found that he wasn't able to stop wetting the bed. His little brother had earned him back his underwear at nights when they swapped and he'd quickly spoiled it after four accidents in two weeks.

	Another two weeks passed by, and the familiarity of the diapers only increased the frequency of the wettings. The first week, he was dry for two of the nights and the second, only one. 

	The effects were limited to nights until one day when he was walking his brother home from the gym and found his bladder fuller than normal. He tried to hurry along his little brother, but Kevin was sore and tired. As they neared the house, Nick peed himself with a handful of onlookers as he was forced to continue walking home.

	No one likely thought much of it, even if it was embarrassing. Riolus weren't normally teenagers and they probably thought Nick was Kevin's younger brother. If only they knew.
	
	When they arrived home, their father noticed immediately, doing a double-take. He hadn't expected his sixteen-year-old son to come back with wet pants.

	Because Kevin been doing perfectly with his training, he was graduated to a bed and his crib was put into the garage for storage. The only reason he'd been sleeping in a crib at six years of age was because it made diaper changes easier. These thoughts burned into Nick's brain as that crib was wheeled into his room and he was put into a diaper early for the night.

	Once more, the familiar garment didn't help the process of holding in his bladder. With the diaper snug around his waist, he only noticed that he'd had an accident when he went to go use the bathroom before bed. He wanted to throw a tantrum as he was put back into the crib that night. He didn't deserve this! The game had all been of his cousin and little brother's making. Yet he was the only one who still had to play it.

	Another month passed and Nick found himself unable to have a single dry night or day, which meant that the crib became his new bed. His old bed disappeared during the night and where once he had dressers full of underwear, only thick Pampers remained. His potty training had completely undone itself. He would be turning seventeen in a few days and he was back in diapers. He hadn't even evolved into a Lucario yet!

	Physical training had gone well, at least. His cousin hadn't produced the blackmail of him in a wet diaper. Their training Gis largely hid his bulging secret. He was surprised by how little the diaper impacted his performance in events. The main difference was that his father would now take him into the bathrooms to change every few hours.

	Questions were certainly being raised by their parents. For their sixteen-year-old son to suddenly start bedwetting out of nowhere was strange. That and most Riolus in tournament fighting evolved by the time that they reached twelve. He was almost seventeen. Even normal non-fighters evolved by their sixteenth birthday. He was an extreme outlier. It was posed to his parents that he might somehow be too stressed to evolve, hence the bedwetting. It wasn't unheard of for Pokemon to halt their own evolutions in times of stress. 

	As a result, to Nick's dismay, he stopped training altogether. They used the same techniques they'd used to calm down Kevin when he was throwing his tantrums, using paralysis berries to calm his body. They had effectively switched places without Tyler's blackmail, this time.

	Nick did his best to earn back his status, but his father wouldn't let him train, assuring him that he had plenty of time to become a good fighter. He just needed a vacation. He was denied potty-training and soon found himself unable to even tell when he had wet himself.

	His seventeenth birthday party came, and to the teenager's dismay, all of his gymmates were there. In the other room, Nick and his father were arguing. His father wouldn't let him hide, stating that he would simply need to accept that he needed the diapers. Nick refused, stating that he didn't want to go out, repeating the same point over and over.

	 His father had enough and with the pacifier shoved into his muzzle, Nick was stripped down as his father held him over his lap and began to spank him.

	Nick wailed like an infant, unable to hide his humiliation as noise attracted the attention of the partygoers, revealing him with his soaked Pampers over his knees while his butt was slapped over and over.

	He calmed down, but wasn't allowed to put on pants as punishment, forced to attend the rest of the party in nothing but his wet diaper. His former friends said very little about it in his company even though he could hear the snickers and discussions when they thought he wasn't listening. There was a rumor going around that he wasn't able to evolve because of his bedwetting and this was sweet confirmation for those of his gymmates that wanted to see the teen have some comeuppance.

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	Perhaps the party was the punishment that Nick needed. For three months, he did his best to remain on his best behavior. He was banned from training and could only enjoy leisure that his little brother had once enjoyed, watching cubby tv shows, going to the park to play, and playing with his little brother's old toys. Nonetheless, without access to the potty, he found himself completely dependent on the diapers, moreso than his little brother ever was.

	Those three months passed and he was eventually allowed to begin potty-training again. It was middling success at first. It took him another month to be able to regain his daytime continence with only the occasional accident. Another month more and he started being able to have dry nights occasionally. After three months of potty training, he was having great success, with more dry nights than not.

	In that three months, his little brother Kevin found great success as a tournament fighter. He'd done great in his debut, placing 2nd in the sub-10 category. After that tournament, his brother grew a lot more bold and one night, the family awoke to found that he'd evolved into a Lucario!
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	Kevin liked being the more responsible and bigger brother for a change. His dependence on diapers had always been because he could never measure up to his older brother and didn't want the pressure of being compared to him. He never told the family about the everstone he found by chance and had hidden in his brother's room a long time ago. He didn't know what it was at first and had forgotten about it until one day when he learned about it from a story that he was being told by Tyler. When he'd confessed it to Tyler on that fateful weekend, his cousin had been surprisingly helpful in concocting the plan to turn his big brother into a baby until he surpassed him.

	"Just another year, baby brother. Then we'll let you evolve. I promise," he said, stroking Nick's fur as he placed a pair of headphones on the Riolu's ears. Silently, he watched the Pamper fill up in response, leaving the room with the hypnosis tape in his paw.