Amelia loved pranking Pyren. It often involved making him hyper or macro, to the point where he destroyed the world. Pyren never liked these pranks and often chastised Amelia about them but she continued to do them.
It wasn’t so much that Pyren didn’t enjoy the results - hyper pranks had their pleasures and it was certainly fun being mountain-sized, but what Pyren didn’t like was the fact that Amelia displayed such power over him. It was like he was a slave to him... or a fool, rather. Somebody to humiliate for her own entertainment. He needed to get her back somehow.
Right before leaving on a trip, Amelia cast a little spell on Pyren when he wasn’t looking. It was a latent thing, so it wouldn’t activate before a certain amount of time. She figured he could use a faster means of transportation anyhow.
About half a day into his trip, Pyren saw the results of the spell - after taking a brief rest, he woke up to find his head above the treeline! It took him several moments to register that he’d grown several yards tall. Feeling disgruntled, Pyren stomped his foot in anger. He accidentally crushed some sort of structure - Pyren looked to see it was a small well that was now in ruins. Whilst observing it, he noticed that he was having another growing spurt.
As a test, Pyren looked for another structure. He found a little tool shack and stomped on it as well, which again triggered some growth. It seemed that the more he destroyed, the more he would grow. An obvious prank by Amelia to play on his dislike of hurting others with these massive practical jokes.
Hurting others... that gave Pyren an idea. He started marching back towards his house, actively searching for things to smash. He came across several small structures and even other Pokemon and crushed them like the insects they were becoming. Everything he smashed added growing numbers of yards to his size, making him a quarter mile tall by the time he got to his house.
Pyren called Amelia to come outside. The Mawile strolled out into the open with a little smirk on her face, pleased to see the fun results of her prank. To her surprise though, Pyren had his paw lifted over her when she looked up at him. With a wicked smile, Pyren brought his foot down and smashed Amelia. His growth resumed, making him half a mile tall. Pyren reached down and picked up the speck of a Mawile, who had been protected enough as a steel type to survive the crushing. Pyren lifted her above his head and opened his mouth, dropping Amelia in his maw and eating her whole. “I hope it was worth it.” Pyren said to her, rubbing his tummy.
As long as he was this big, Pyren decided he would see how far he could take this prank. He walked over to the nearby city, carelessly stepping on anything in his wake, and paused on the outskirts. The inhabitants panicked at the sight of the giant Monferno. Pyren lifted his foot up and kept it just above the city as if to tease. Everyone in the city started running. How pathetic. Pyren brought his foot down as hard as he could and smashed everything beneath his sole - any part of the city that had escaped his foot was obliterated by the shockwave that followed.
The growth spurt Pyren got from that was amazing. Pyren grew a full mile tall, then five, then ten. He was twenty miles high before he stopped growing. His feet alone were several miles across, easily crushing any landscape they came onto. Pyren started casually walking across the continent, letting his feet fall on anything they happened to hit. Almost every step made him grow a mile taller - by the time he’d walked across the whole continent he was three times taller than the atmosphere itself.
Luckily for Pyren the magic causing him to grow also kept him safe from suffocation. He liked being in the atmosphere though, so he decided to have a nap. He sat down on the continent and then laid down on his back, disregarding anything he happened to crush with his body. The sheer amount of destruction he caused with that simple action was enough to set off his growth. Pyren’s body spread across the land as he grew, destroying more things and adding to his growth even more. It was like a never-ending cycle, and it left him continent sized before he ever stopped.
Pyren sat up after a while, feeling well rested. The world was getting much smaller to him. He paused to think of what else he could do to it. Something occurred to him that might be fun and delicious - Pyren punched the continent that had once been his home and made a hole to the planet’s mantle. He leaned his head down and lapped some of it up. True to his suspicions, it tasted delicious! Like a hot slushie, he thought. He started drinking up the mantle, which rapidly added to his size. Pyren found himself having to constantly rip chunks out of the world’s crust to get his head in the mantle, which added to his growth as well. By the time he’d finished with his snack, he’d long outgrown the world and was floating in space, not unlike a deity.
Pyren rubbed his tummy in satisfaction, before looking and realizing that it had a faint glow to it now! Curious, Pyren floated over to the moon and ripped it open, dumping all the mantle into his maw at once and swallowing it all down. Again he grew, and he saw his stomach glowing brighter.
Pyren found himself intrigued by this discovery. He started floating to other planets, ripping them open and drinking their contents. The small, solid planets were little more than marbles to him now, but there were several gas giants that offered him a true feast! Pyren landed on the biggest one and punched a hole straight through the crust. He dived into the mantle and swam towards the center. Once there, he opened his mouth and started feasting, practically inhaling all of that liquid rock and growing rapidly from doing so. Pyren could literally feel his growth welling up inside of him, and he tapped into that and tried to hold it back for a grand burst of growth.
All of the material that was once the gas giant gravitated towards the center where Pyren was feasting. When there was no more mantle to be had, Pyren let himself grow and absolute BURSTED to a massive size. He was several hundred times the size the gas giant had once been. The glow of his stomach was much brighter now, and Pyren couldn’t help but wonder if his sense over his growing power a few moments ago were because of this glow.
Pyren looked at the other gas giants and floated over to them. He could eat them all whole with how truly massive he was, each planet he consumed making him even more so. When every planet in the solar system had been consumed, he turned his attention to the true target: their sun. A big massive ball of flaming energy that would make him truly immense if he ate it. Pyren floated over to the star, feeling no negative effects from getting so close, and started scooping up some of the material. It tasted amazing!
Pyren dived into the star and started drinking up all the plasma around him. He grew rapidly, more so than any other time before! Pyren felt immense power welling up inside of him - power which he wanted more of. He drank and drank the sun away until he sucked up the last bit, putting the non-existent solar system in darkness with only him remaining.
Pyren’s stomach was glowing brightly now, almost like the sun itself. He could feel something new within him. That spell Amelia had used on him wasn’t hers anymore - Pyren could control his own size now!
So why stop there, Pyren figured. He tapped into this new power and started growing on his own. Pyren rapidly increased in size, making him visible in comparison to all the stars in the galaxy. Many nearby stars started to gravitate towards him, and he took this to his advantage. Pyren opened his mouth and let the stars fall in, giving him more and more power for each one he consumed. On and on his growth went. Pyren outgrew the whole galaxy before he’d even consumed a quarter of it, making the rest of the meal as easy as snapping his maw around the whole galaxy.
Pyren's growth just kept accelerating. Eventually he had to hold it all back to keep from outgrowing the universe before he was done with his godly feast. It was so hard not to grow with all the stars he was consuming, making his power grow and grow! He felt so much potential within himself - he could outgrow whole dimensions or even the multiverse with all this power! Yet he still wanted more. Pyren kept eating and eating and growing and growing, taking up more space in the universe until he had to curl up to fit.
As he consumed the last few galaxies in the universe, Pyren felt something new again. It wasn't exactly different from before, when he felt his growing powers come into fruition, but this was much more! He could feel inside of him a source of limitless power that could let him grow without end. He had no boundaries anymore.
With that thought in mind, Pyren stretched out his limbs and popped the universe open, freeing himself from its feeble confines. Pyren looked around at the millions of other dimensions in the multiverse and smiled. He floated over to one and ripped it open, devouring the stars inside. That Pyren didn't need to eat the stars anymore didn't mean he couldn't do it anyway.
