Larry Koopa, the youngest of the koopalings, had managed to get his claws of a bunch of mushrooms. 
‘Hehe, I can’t believe these damn things were such an easy grab!. It’s like they weren’t even trying to stop me at all!’
He laughed.  Larry then picked up one of the mushrooms, observing it.
‘I’ve always wondered what it would be like to have one of these...with one of these mushrooms, I could have a higher advantage against the Mario bros!’
He said to himself, wagging his small tail back in forth at the thought of towering over the Mario bros.
‘Ohh I can’t wait, down the hatch!’
Larry opens his maw wide open and chomps the mushroom whole.
‘ugh...tastes weird. I don’t understand how-’ 
Larry gets cut mid-sentence by a tingling sensation flowing throughout his entire body.
‘Ooohhh~, I feel tingly~’
Soon, Larry felt his body begin to grow. His vision rising upwards.
‘WHOA!, I-IT’S WORKING!!!’
Larry shouts. Larry glides his claws all over his expanding body, feeling his scaley body grow bigger and bigger.
‘Oohh~, this feels a lot better than I’d imagined...c’mon, BIGGER!’
Larry began to feel aroused, his dick slowly turning erect. He moans and blushes in pleasure as his dick throbs along with his heartbeat. 
‘I..f-fuck~, MMMHF!!!’
Larry gets on his knees as his muscles suddenly ripple. They swell up bigger until they become well toned.
‘I...i-i have m-muscles now-OOHH~!’
Larry’s dick throbs harder than before, leaking pre. He bites his lips as he feels something coming.
‘MMHF~!, I THINK IM G-GONNA!’
Larry moans loudly as he reaches his climax. His cock bopped up and down as it came torrents of cum, staining the floor in a puddle. 
‘A-AAAHHH~!!!’
Soon, his climax finally subsided, leaving him panting heavily. He gets off his knees at full height, he grew from 3’8” to 10’1”.
‘WHOA, I-I’M HUGE!!!. IM PROBABLY BIGGER THAN DAD NOW!!!’
Larry observed his new point of view, looking at his new toned muscle body.
‘And these muscles...I LIKE THIS~!’
Larry flexed his biceps, feeling them swell up. He looks towards his left, seeing a bunch of mushrooms left.
‘Hehe...and there’s still a lot of mushrooms left!’
Larry picks up four more mushrooms.
‘Hehe, let’s see how much bigger I get when I eat four at a time~’
In a matter of seconds, larry eats all four mushrooms at once. The tingly sensation returns, but far stronger than the last.
‘Oohhh~, here we GROW!!!’
Larry grins as his body grows even bigger. His muscles ripple up even more and swell bigger and bigger.
‘NNNNGH~!’
He groans loudly.
‘ OOHH~!, DAMMIT...BIGGER!!!’
Larry moans as his cock becomes erect again, throbbing more harder than before.  His head then bumps into the ceiling.
‘OW!’
Larry sits back, slowly filling out the entire room. 
‘Hehe, it’s getting a little cramped in here~’
Larry says before his muscles swell, even more, causing him to moan. His voice suddenly grows deeper as he grows bigger, making him sound beastly.
‘MMMHF~!, M-MY VOICE!!!. I-ITS GETTING DEEPER!?!?’
Soon enough, the ceiling begins to crumble apart from larry’s growing body. He grins at this and begins masturbating himself. He grits his teeth as he felt something coming, much stronger than the last.
‘RRRRGH~!!!, I-I’M GONNA C-CUM!!!’
Larry lets out a booming roar that could be heard from miles. His cock throbbed, rope after rope of cum. His cum stained far away grasslands and formed ponds. After a few minutes, his climax finally subsided. He grew from 10’1” to a gigantic 157’8”.
‘Ha ha ha ha, damn...look at me!. IM AM A FUCKING GOD!!!’ 
Larry flexed his biceps and moved his pecs.
‘Those mushrooms were definitely worth the take!’
He lauged to himself before stepping away from the debris. He takes a moment to look around in his new perspective.


‘Damn… I really have grown big haven’t I?’
He said to himself.
‘Well...time to find the Mario brothers~’
He made his way to the mushroom kingdom, the ground shook with every step he took.