It was already 11pm when Blake came home. 
He was spending all the day outside with his by far strongest Pokemon Archie. It doesn't need much fantasy to discover that Archie was an Arcanine,  a very huge one. 
The fox was taking care of Archie since he received him about 4 years ago.  He was his very first Pokemon and Blake is very proud of him. 
When he was a little Growlithe he didn't looked like something very special,  he also wasn't very strong but when Blake used a Firestone to evolve him things changed.  He became very huge and more muscular than every other Arcanine.  Blake started to go to a journey and became a well known trainer.  Of course he had to catch other Pokemon as well to become a good trainer but Archie is by far the strongest of them. 
Only in special situations he will send anyone else than Archie into a battle. 
Archie always was very active and sometimes a bit too cocky.  Sometimes it anoyes even his trainer but when things become serious he always can count on Archie. 

How I was saying,  Blake was training with Archie all the day and arrived home,  well it wasn't really his home.  With Archie on his site he started to think about challenging the elite four,  for which he started training even harder.  For this he was renting a room in a hotel that was near a lot of places to train Pokemon. So it was a perfect location 
Blake entered the room,  followed by Archie.  Archie never was a fan of poke balls and so Blake was only putting him into it when there is no other way. 

Blake put of his shoes and laid down onto the bed,  sighing very audible.
Archie was standing next to the bed and looked to his trainer with sad eyes.  His ears were.laying flat and he whined a bit. He pushes his nose against the foxes body and tippled a bit on the floor. 
Blake came into a sitting position and hadn't to think very long. 
He started to pat Archies had "aww poor boy gotta pee, huh? "
Archies response was a little nod and an other whining 
During the training the Pokemon wasn't taking any advantage of his bladder and didn't felt even a bit how full it was.  An little disadvantage of the city was that they don't allow any form of public urinating  and the next park is twenty minutes away from the hotel.  The risk of getting caught during urinations in public is almost 100% since there is police everywhere.

"I think we both know that you can't hold it in long enough to reach the park without any 'accidents'. Well I got an idea. "
The fox now walks to a door and opened it and shows Archie the bathroom. 
The Arcanine tilts his head,  expecting what he will be told to do.  Blake saw this and laughed a bit 
"Don't worry,  that I am asking you to use the bathroom doesn't mean that you have to use the toilet "
Archie now was a bit confused 'what should I use then ' he was thinking.  Blake saw how helpless Archie was and explained "Well you just have to come in and let it flow.  These are only tiles,  nothing will soak in,  it will only flow to the runoff and the rest will be cleaned by the staff "
Archie was understanding know and walked in. He tried to relax his bladder to pee onto the bottom but it didn't work. 
It sounds easy to just pee onto the floor especially with a bladder that is only one drop away from bursting but it wasn't that easy for him.  It felt very strange for him and so he was having a mental block. 

Blake wanted to help his friend and pats him a bit. Archie was letting a few drops onto the floor a success more or less.  It was only a few drops which was nothing for Archie who easily pees about 2 liters of urine against a tree and now it was completely full which meaned an amount of 2,5-3 liters that was in his bladder.  Yeah a big Pokemon produces even bigger amounts of pee. 
Blake now was knowing that Archie only had to relax a bit and started to rub his belly.  He was taking a bit advantage to press it a little bit to force the urine out . And it worked a bit.  
Archie was able let a bit more urine flow and closed his eyes.  As fast as it started it was stopping again.  The plan was good but not perfect,  Archie had to relax more which meaned that Blake had to try something else. 
Blake had a last idea and laid down onto the floor,  under Archies belly. 

Blake was afraid about what he was going to do but it was the only way he could help him. 
The fox slowly moves his paws into the direction of Archies sheath. 
He slowly started to play a little bit with it and blushed. 
Archie was shocked at first but indeed it came out to be helping to calm Archie down a bit and it took him only a few seconds before the urine was flowing.  Unfortunately for the fox the stream was aimed right into his face. 
Archie was so relaxed that he didn't realize Blake's tryings to move away from the stream or the begging to the Arcanine to turn a bit. But since he knew that it calmed down the Arcanine he continued to play with the sheath. 
It took exactly 1 minute and 30 seconds until Archie emptied his bladder completely. 

Blake was pushing out Archie out of the bathroom immediately.  Archie wasn't trying to resist it  (otherwise Blake wouldn't be able to do this ). The fox was taking a shower for about an hour before he came out and laid into his bed.
Archie was jumping onto the bed too and licked over Blake's face.  The fox chuckled and hugged his friend "hey aren't you a bit tired too?  how about we are going to sleep? " 
Archie was nodding and walked into a circle before laying down onto Blake's body.  He was making the typical position of a sleeping dog.  

They were sleeping for three hours before Archie started to get a bit more active.  He still slept but moved a lot what was waking Blake up. 
"C'mon Archie,  please stop this. " he tried to wake him up by poking his hips but it didn't work.  
Luckily the movement stopped shortly after but Archies position wasn't that lucky for Blake. 
He layed flat on the foxes body.  Blakes head was placed right between Archies hind legs which gave him a good view of a fluffy Arcanine rump.
Blake tried to put him off him but Archie was way too heavy. Also his arms were trapped under the canine 
The only response was a gurgling sound of Archies belly.  
Blake got a bit nervous.  He was going to breath in when he saw the tail of Archie moving upwards and heared a very silent hissing sound. Blake felt a big heat but he only realized what just happened when he got a full whiff of an God awful stench that reeked like pure sulfur.  
He than was hit with an other,  this time very squeaky fart. It didn't last long but the acrid stench was immediately burning into the foxes brain. 
Blake tried to escape from under the heavy dog but the weight was too big.  He started to yell but was regretting it shortly after when Archie moved his rump back.  
The foxes face now was completely covered in the big fluffy ass.  The fact that his mouth now was forced to stay open didn't made it better. 
Blake got it when Archie ripped out an other gust of his hot and nasty gas. 
The fart may smell very bad but the taste of it was pure hell.  Blakes mouth was getting very dry when the shot of gas assaulted his tongue.
Blake was starting to cry but it didn't help him to protect him from an other burst of Archies gas. 
It was an other stream of hot sulfuric gas that was pumped straight into the poor lungs of the fox. 
Archie sighed audible before he moved a bit forward again so that the knocked out fox received fresh air again. 

It was about 8am when Blake was getting back his vision only to see Archie still in the same position.  The room was heated up and the air was very hard to breath especially with a sulfuric stench.  Archie was clearly letting his gas flow all the night. 
Archie was slowly waking up and starts to sit up...  onto Blake's face.
The Arcanine didn't realized it. 
He was closing his eyes and started to let out a low pitched fart.  The gas was letting his butt vibrating and sounded like a loud tuba.  Archie was leaning forward the longer the morning fart lasted. 
With a loud sigh the Arcanine ended the twenty seconds long fart and stood up,  only to see the passed out fox there.
Archie wanted to push his nose against Blake which resulted into him sniffing his fart that stayed in Blakes fur.  He abruptly backed away and shakes his head. 
When Blake woke up he was taking a very long shower but still smelled like Archie's fart cushion.  It took a few days until the smell was gone.