"Hello. Are you alright?" I hear, feeling a sharp nudge by someone. I slowly open my eyes, rubbing them with my paws. But... paws? I sit up quickly as I look at myself. A fire alights my back and butt. I had seen Pokémon enough to know it was a Cyndaquil... that I was somehow in the body of one. But I couldn't understand what happened. Not only did I not know about how I was turned into a pokémon, but also I didn't know where I was. My surroundings felt foreign to me... It was a glade. A forest was around him, enclosing me, but the glade felt like a safe place. The fire was warm and it felt comfortable, probably because my type was fire. "Hey, you ok?" I look toward the source of the voice. Beside me was a Bulbasaur, gazing at me with concern. It felt like a shock: not only was I a pokémon, but I also could understand other pokémon. I could also read his facial expressions, they didn't feel painted or static like most pokémon we see as humans. I felt like I could understand bulbasaur in a different level. Bulbasaur was pacing in place with his hindlegs and seemed tense.
"I'm fine." I roll over, getting to my feet. I look around at my surroundings again, confirming that this area didn't look like any region I've ever seen. I look at the nervous Bulbasaur. "Where are we?" The Bulbasaur smiles. "You must be new here. This is where all the pokemon trainers release nowadays. We call it The Forgotten Idle." As he talks about everything, I notice that he was showing signs he was holding: that pacing in place was a sign that he needed to release his urine urgently, but his face was serene, as if he was not willing to do so anytime soon. The Bulbasaur's lower part of his belly was rather inflated and he was crossing his legs whenever he was not pacing in place. He has a half-erection. "Do you have to pee?" I asked, half wondering if that was a dream. Why would I ask bulbasaur about his urge to pee in a situation like this? I was just turned into a cyndaquill and I'm having a potty talk? It was something primal in me that pushed my curiosity to a level that was hard to manage. Perhaps it's something to do with this body. I'm more like an animal, so things like this probably interest me... The Bulbasaur was kinda shy about the question. "Well, yes and no." I was confused by his answer. He could leave me for a few seconds to go pee so why was he holding. "What do you mean?", I asked. "Well I do have to pee but I don't want to let it out yet.", he answered.
I kind of understood why but because of my fetish, I had a powerful urge to make him pee. As a human, I liked to make others to wet or mess themselves when I noticed signs that they had to go. It always made me sexually aroused. Mayhaps this body wanted to mate... but I can't do that with someone I just met, even though it would be acceptable for pokémon to do so. I still had my moral sense. "So how long have you been holding in your pee."  I rub the tight bulge that I assumed was his bladder. It was taut and nice to the touch. Felt warm. Bulbasaur flinches a bit. "Oh, a few days.", he answered. "A few days? You must have an iron bladder." If I had to hold that long, I would have wet the bed at the end of the first day. "Sort of. Because I am a grass type, I need a lot of water. Because of this, it give be ample opportunity to hold.", bulbasaur explained. "Really?" I pinned the Bulbasaur down after tackling him. He was so full that I swear I heard a sloshing sound coming from inside of his body. "What are you..? Oh, you have that fetish." He smiles. "Go ahead. This is a great way to test my bladder." 
I am taken aback by this. Normally, when I do this to someone, they are kicking and fighting back but he was just laying there, smiling at me. "Why are you calm about this?", I asked. "Because I wanna be your friend and if this is your kink, I am not gonna stop you. Think of it as a deal. I let you do this and I have to be my friend and take me with you." Exchanging friendship for sexual play feels like exploitation... but, provided I didn't actually mount him... perhaps it's okay. Or perhaps my pokémon instincts were getting the best of me. "You drive a hard bargain." I joke. "But can we a least introduce ourselves first. I'm Thorn." I open my mouth to answer but stop at first. What was my name? I somehow forgot. "Umm. My name is... Mercury." It was just made up. "Huh. That's an interesting name. Nice to meet you.", said Thorn. I cut the conversation short by softly pushing on Thorn's bladder.  He crosses his legs harder. I figured this was going to be easy. If he's held it for this long and his bladder was this sensitive, this would take only a few minutes. I figured I'd use my less painful means since he was being so nice. While moving my paws on his tummy and kneading that bladder, I heard the sloshing again. There was a vibration under my paws, as if I was manipulating a balloon full of water, but still with room to expand. He would probably be able to hold yet another day. That was impressive.
I attemp to spread his legs. He fights me for a bit but I am able to get his legs spread apart long enough to see his cock, still only half-erect. I hold his legs open with one paw while softly rubbing and pushing on his bladder with the other. Right now, Thorn is only holding with sheer willpower, which he seems to have a lot of for a pokemon as small as him.
After a few minutes of rubbing and kneading his bladder to no avail, I decided to try a different approach. Tickling seemed to be the best option at the moment so I start tickling his underbelly. He however doesn't seem to laugh. "I'm not ticklish there." He jokes. No wonder he was so calm; nothing was working!
"Ok. Then where are you ticklish?", I asked, out of desperation. "That's for me to know and you to find out.", said Thorn. I try the rubbing and pushing but it seems that he has a iron bladder. I have to find his tickle spot. Doesn't help that he can't lay all the way down because of his pod. 
It seems like I needed to step up my game. The problem is my claws. I don't want to hurt him yet these claws aren't doing me any favors.
I try to tickle him in other places but nowhere seems to work. "Boy, you must have a pretty hidden tickle spot.", I said. Bulbasaur laughs. There was only one other spot, the anus, that I hadn't tickled yet but I wasn't going to do that till a last resort, which wasn't too far off. All of my tricks weren't working, at least my non-painful options.
There was only one more more thing I hadn't tried yet. I walk over to a  lake and scoop up some water in a trunk. I start to slowly pour it in front of him. He does squirm a bit but it only causes him to leak a bit onto the grass. "Well, I wasn't going to try this but I guess I have no choice." I turned him upside down, in a way where his butt is showing. He is trembling, after the water trick. Tickling him in such a state would certainly work. I begin to rub it. Surprisingly, this causing him to squirm worse then anything else. "Really? This is your tickle spot?", I asked. He nods reluctantly. I sigh in annoyance. If this did make him pee, I'd be in the splash zone but getting peed on is worth making him pee, especially if he's been holding if for days. I continue to rub his tailhole. He starts to squirm more, trying extremely hard to prevent himself from peeing. A shaky smile formed on his face and tears welled up in his eyes. He was trembling harder and now I could get a constant dripping from his half-boner. This is exactly the reason why I love doing this. The squirming. The fear. He starts to leak a lot now, causing my fur to get a little wet. I didn't care though. I was euphoric. Almost enough for a boner, but for some reason, this wasn't getting me as hyped as I thought. Maybe cause I wasn't used to this body just yet. Suddenly,  I felt a waterfall of pee hit me, soaking me to the bone. I was glad it was warm or I would probably be shivering. I wanting to move away from it but for some reason, I stay put, letting him full pee on me. Thorn's urine smelled nice and gentle. He must have drank a lot of water, because it was very diluted.
Bulbasaur looks in horror at the fact he was peeing on me. He must have never done it before. He seems to try to stop the stream but the floodgates were fully open. As much as he tried, he could only make the strem flow slower. His body was tired from holding for "a few days". He tried changing positions, but I kept him held, so he didn't leave his spot. He pees for a few minutes before it tapers and eventually stops. "I am so, so sorry.", he whimpered. "Don't worry about it. I'm the one who cause you to pee. Anyway, what are friends for?", I asked, panting a bit. "You...you still wanna be friends?", Thorn asked, relieved. "Yeah. That was the deal, wasn't it?"
He jumps up and down happily. "But I need to clean up first.", I said. I start my back flames on fire, making the pee evaporate. "So... will you show me around?", I asked. "Yes yes yes!", said Thorn, now no longer lonely. He literally pulls he behind him like a ragdoll. I found a surprising friend here that didn't care about my fetish. I wondered who else I'd find on this new area.