Crystal Wishes

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Author's Note: This is based off of a headcanon I have about a moment in the original game that I think would be a great fit in the Undercaged lore.

This takes place when Sans and Grillbz are still kids and Gaster is still alive.

***

"Huff...puff...Sans...if you...huff...wanted to have a race...puff...could you...huff...please...puff...WARN me next time?!" Grillbz panted, eyeing his friend with a mild death glare as he sloshed in the water behind him breathlessly.

Sans chuckled at that response as he brushed some mud off of the front of his yellow and blue striped shirt.

"Sorry sorry! I wanted to see how far we could get into Waterfall from the bench on foot!" he explained, stretching his arms over his head while Grillbz caught up to him.

"It was purely for scientific reasons! Nothing more!"

Grillbz shot him a confused glance.

"I GET that but did we have to sprint?" he questioned in a gasping tone.

Sans snickered.

"Nah...that part was just for fun."

Grillbz gasped a moment before shoving Sans slightly with a mock look of shock.

"You are SUCH a troll!" he exclaimed.

Sans swung his arms wildly to keep himself from falling into the water, but it was all in vain. He soon fell back with a splash and sputtered a few moments as water flew into his face. 

"Peh! C'mon Grillbz! Was that REALLY necessary?" Sans questioned between spitting up water and fits of laughter as he adjusted his drenched glasses. 

Grillbz raised an eyebrow with an amused smirk.

"I dunno Sans...are you sorry?" he asked innocently.

Sans tilted his head slightly as he smacked the side of his skull to get water out of his ears. 

"I dunno...little bit?"

Grillba nodded in approval.

"Then yes. It was very worth it."

Sans rolled his eyes as he grinned.

"And you say I'M the troll." he joked.

Grillbz gave a slight giggle at that as he extended a hand to help Sans to his feet.

"What can I say? You've rubbed off on me." he smiled, grasping Sans' hand firmly as the skeleton began to stand.

Sans paused to wring out his hoodie slightly before taking a look at their surroundings.

"Huh...don't think I've actually been in this area before..." he thought out loud.

Grillbz gave a deep sigh as they began to walk.

"That seems to be a trend with you..." he pointed out.

Sans shrugged.

"I dunno! I just have morbid curiosity is all! Don't hurt to explore the cave a bit! I mean...it's not like there are many places we can ACTUALLY go."

"I know but still! Every time...EVERY single TIME...you drag me off on one of your 'adventures', you ALWAYS get us lost! Not even just in Snowdin! I'm pretty sure you've lead us on a wild goose chase five separate times in Waterfall alone! And in the past week no less!"

Sans raised a pointing finger in Grillbz's direction.

"HEY! In MY defense, my family was originally from Hotland and my dad works in the Capitol! I don't exactly go through this area often." he said defensively.

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