This was originally a commission sketch that I got from  Saphiros that I decided to ink/color.

---Story time---
MP continued to generate within the Luxray mage, his body stockpiling more and more energy, converting it into fat at an alarming rate,

This process was nothing new to him, his size and weight was always constantly fluctuating due to how his body channeled magical energies, the fatter he was, the more magic he contained and that meant more capabilities for spellcasting.

But this was far too much! Something, or someone had placed a hex on him, his body kicked into overdrive with absorbing magical energies, drawing in magics from even the smallest of sources, all to be formed into massive girth.

Even the magic that he enchanted his clothing with, which allowed for it to expand and grow along with him was being sucked into him like a sponge, with the enchantment no longer in effect his clothing began to rip apart at the seam to make way for his expanding girth!

Desperate to free his body from all the stockpiled MP, he cast random spells, at first he tried to re-enchant his clothing, which seemed to work to some extent before it was sucked right back into him, his clothing struggling to contain his body. He then cast a thunderbolt at a nearby tree, only for it to arc back from his palms directly towards his stomach which caused it to ripple and puff outwards.

Spell after spell only seemed to have the same effect, it all came right back into him. But after a while it stopped bothering him, it actually felt... good, the fat, churning and gurgling as it pumped into his body made him feel more than just powerful, so much so that he wanted more, he NEEDED more, and he knew where to get more.

Whenever the mage in the past had gathered too much MP, he would convert the energy into two types of potion, HP and MP potions for later use. Underneath his mage's tower rested two giant cauldrons each the size of a house, filled to the brim with liquid magical energy.

This had been stockpiled since his very first steps into the magic arts, this was at least a decade's worth of excess magics that he stored away, and now he wanted it all.

He staggered and wobbled his way into his tower, only just managing to squeeze through the door frame, his body still expanding, that wasn’t enough to please him anymore, he needed to be even bigger, and even more powerful!

He made his way downstairs, just managing to fit down through the passageway before his body rendered him too big to navigate through. it did mean he was now trapped in his basement, probably for the best he thought to himself as the finally the last bits of his clothing burst free from his body, rendering him completely naked.

His basement was practically its own village in terms of size, you see his downstairs was actually a portal to a pocket universe, a pocket universe filled to the brim with various magical artifacts that he had collected over the years, all of their magic now finding their way into his body, his body expanding, pulsing outwards at a steady pace.

He shuddered in delight as he stroked his massive girth with both his paws. This was nice, but this was merely an entree for the Luxray at this point, his eyes now fixated on the two cauldrons.

The were enchanted to increase in size to accommodate for however much was stored inside them, for now this was the only enchantment that his body was not interested in absorbing. The Luxray was now just as big as the cauldrons that stored his years of excess magic.

The liquid inside the first cauldron was coloured a deep crimson red, the other was a dark blue, both almost having a thick syrupy look viscosity to it. The scent of pure magics filled his nostrils his body pulsing outwards eagerly with anticipation.

He greedily reached a paw into the cauldron filled with the red liquid and began guzzling it down, the taste was sickeningly sweet, he had engineered it that way, there was no point in a potion tasting awful, but the potions he would carry with him were always diluted, this was the pure solution. He gave it a hard swallow, his already bloated neck bulging out moreso as the liquid hit the inside of his stomach.

In a heartbeat the Luxray’s body exploded with fat, a simple mouthful doubling his already grotesquely obese frame. The surge of power hit the mage with blinding euphoria, his eyes widened, his heavily bloated face, giving off an almost devilish grin as he lunged his head into the giant cauldron, guzzling down the liquid like a tall glass of ale after a hard day’s work. (Not that he would know what physical labour was)

His body errupted in size, his blue and black fur cascading from all angles, filling up the entire room in a heartbeat, his body pressing tightly against everything that was in the room, but only for a moment, as the mage grew, the rooms walls and ceiling grew with him. The room itself functioned the same way the cauldrons did, it would grow to accommodate whatever it was that was stored inside it, in his case, a very power hungry... or rather power thirsty mage!

There was no point of reference for him to measure just how big he had gotten in such a short time, but he could feel every inch of his gigantic body ripple and surge with energy. his eyes glazed over, and he nearly passed out from the sheer bliss of being filled with such overwhelming power!

It did not take the Luxray long for him to finish downing the first serve of concentrated magic, he took a moment to catch his breath, before moving on to the second cauldron.

The first was filled with magics related to physical recovery, or simply HP, and his body was certainly aglow with life, the blue fur brushing heavily against the room, rippling and surging outwards like the waves of the ocean the instant the room expanded to accommodate for what it was storing.

The second cauldron, was MP, and everything to do with power that the magic crazed Luxray seeked.

With the first gulp, his body exploded outwards once more, demanding even more space of the room, the accommodate for his mass of lard that was beyond comprehension, the sheer amount of power that piled onto him, the swirling euphoria was beyond anything he could even begin to comprehend, his body shivered in ecstasy, which paralyzed him to his very core, dropping the cauldron and all his contents dousing him in the thick blue liquid.

But only for a second, as his body began to drink up the liquid instead, literally like a sponge, only for magics.

His body simply grew and grew and grew, and all the ball of fat that was a Luxray could do was moan and groan, his limbs all swallowed by fat, all he could do was watch the blue ocean that was his stomach ripple and surge with the power that he had consumed.

He soon found himself exhausted from the sheer act of containing such power and soon found himself slowly dozing off to the sound of his lardy mass gurgling and churning as it continued to ‘ingest’ the energy he had pumped into himself.

He when he awoke, the growth had finally stopped, leaving him feeling bizarrely content, he worried that he would begin to start craving more energy again, but the temptation never came, he then began speculating a cause for his sudden obsession with power, realizing that it was a repressed desire of his that his own body instinctively took up the call for to satisfy.

The Luxray then pondered a way to undo his predicament. And the solution was simple, all he needed to do was to reconvert the magics he had guzzled down, back into their respective cauldrons.

“Eh not right now” The mage chuckled to himself as he conjured a feast fit for a king with nothing but his mind.

“I’ve been working hard as of late, I think I deserve a break” He chuckled as he began to chow down.