Sonic and Knuckles followed Toriel towards a door which supposedly lead them to the outside of the Ruins.
"Once you exit this place, you shall not be able to return. Is that okay with you?" Toriel turned to ask them.
"Yep! That's okay." Sonic gave a thumbs up. "If anyone comes asking around for me, then tell them I'll be behind this door."
Toriel nodded. "I will."
The two smiled at the goat lady, then quickly took their exit. Now they were in a pink corridor that just seemed to get brighter the further they went. A minute of walking brought them to a dark room with another door that led somewhere.
"Why's this room so dark?" Sonic asked. Only a small hole in the ceiling above was allowing light into the room. Where the light was shining, a small patch of grass could be seen.
Knuckles seemed to recognise this place. "Hey, doesn't this remind you of that room the flower guy was in?"
"It kinda does."
They were heading towards the exit, when suddenly... the flower returned.
"BLEGH!" The flower (Which they now know as Flowey) spat out some dirt and some bits of stone. "YOU TWO ARE ON THIN ICE!"
Sonic tapped the ground below him. "I don't think that's ice, buddy." He said in a condescending tone.
Flowey didn't pick up on the sarcasm, unfortunately, and processed to summon his vines from wherever the heck he was keeping them. "I'll forgive you for being dumb, but don't EVER CALL ME YOUR BUDDY!" He shouted angrily.
Meanwhile, Knuckles prepared to give the flower another smackdown. "Alright buddy, we don't want to get messy with the locals, but I'm not afraid to bash some skulls in."
"I don't have a skull, so that's a shame." Flowey tried to sound as annoying as Sonic did.
"Oh cool. Thanks for teaching us about your biology." Sonic gave him a thumbs up which made Flowey even more furious.
The hedgehog immediately dropped his condescending act and approached the flower. "Okay, maybe that was a bit unnecessary. Do you want to start over?"
"Don't humour me." Flowey spat. "I have experienced and seen things that you probably couldn't even imagine! I have a power that allows me to experiment in whatever way I want! DO NOT UNDERESTIMATE ME!"
"Sure, little buddy." Sonic patted him on the head. Seems like it didn't take long for him to pick up that patronising attitude.
While the two were talking, Knuckles opened the door. A whole avalanche of snow landed on him.
Flowey smirked maliciously. "You know what? I'm just gonna leave you two for now. I want to see how you two deal with this place." Then he left, sinking into the ground.
"Well, that was certainly interesting." Knuckles remarked. Sonic stared at where the flower was for a second, before dashing towards the exit.
"Alright, let's go!" Sonic pointed forward. Knuckles shoved the rest of the door open, revealing a snowy forest. "Wow. That's quite the shift in aesthetics." The blue blur commented on the scenery as they stepped into this new location.
In the forest near a giant mountain, a fox rested on the tree branches. He had been resting there for a few minutes but was abruptly woken up by the sound of rustling approaching him.
He rubbed his eyes, feeling exhausted from everything that had happened so far. First we went on a long journey through Mobius to thwart Eggman's plan, now I'm being chased down by humans?! He thought to himself.
For a brief moment, Tails could've sworn he heard something smack into the tree he was resting upon. He quickly hid himself from plain sight as soon as a loud voice rung through his ears.
"He's not here! Keep searching." A human shouted. "We have to catch that Monster!"
A group of more humans emerged from behind them. They proceeded further into the forest until they vanished from Tails' line of sight.
He jumped down onto the ground and pulled out Miles Electric. "This should be able to track down Sonic's location..."
Fortunately for him, it did. A nearby reading indicated that Sonic was in the mountain that the forest was surrounding. Overhearing a human's shouting from earlier, Tails identified the mountain as 'Mount Ebott.'
The reading wasn't just indicating Sonic however, as there were several different blips on his radar that were all overlapping each other.
"All of them must be over there..." Tails thought to himself as he looked up to the peak of the mountain. But something caught his attention. On the midpoint of the mountain seemed to be a small human that was climbing the rocky hill.
Interested, Tails started to use his tails to fly and followed the small human. He was careful this time as to not 'accidentally provoke them' as he did with the village from before.
Something about the human just seemed off. They looked so determined, but for what reason? Maybe there were some personal problems in play that was forcing them to climb this mountain?
While Tails followed his train of thought for a minute, he briefly missed noticing the human's arrival at the top of the mountain. "Wow. I didn't expect them to reach the top that quickly..."
Tails thought to himself.
He observed them, watching as they slowly approached a giant hole in the centre. Tails didn't realise how big the hole was until now, but it was gigantic. The only part you could safely stand on was the edges.
Speaking of safety, the human seemed to be climbing down into the mountain. The fox got closer to the peak, maintaining his aerial view but being right above the epicentre.
"Wait... are they planning on jumping down to the inside?" Tails speculated as he watched the human from a close distance. "They do realise that eventually it'll get too steep for them? At that point, they'd have to drop..."
Right there and then, the human proved Tails' thoughts to be correct as they tripped and fell into the mountain.
His natural instincts kicked in, and Tails immediately swooped in to save the human from falling in. As they were about to enter, he quickly grabbed onto their hands and hoisted them back up onto the mountain's edge.
"Phew, that was a close one."
Tails put the human back onto the ground and landed beside them. This small human seemed to be slightly taller than him, and looked very... annoyed.
"What's the matter? I just saved you from falling into the mountain."
The human shook their head and crossed their arms, turning away from him. Despite the fact that they hadn't even spoken a word, Tails could clearly tell that they weren't very happy with him.
Something about them just seemed strange. Their very essence just felt more mighty and superior, like it were overshadowing his figure. In a way, it sorted of intimidated him.
"Hey, are you, umm... by any chance from around here? Maybe that village down there?" Tails asked, to which the human nodded whilst still facing away.
"Then do you know why the other humans just started attacking me?"
Suddenly, the human seemed intrigued by what he said. Their facial expression shifted from concerned, to confused, to surprised; all in the span of a second as they looked at the fox standing before them.
"You... you're a Monster, aren't you?" The way that the human had confidently shown their emotions from before seemed to be thrown out of the window now as they spoke with such shyness in their tone.
...but again, they called him a Monster like everyone else.
"I'm not a Monster! I haven't done anything wrong!" Tails shouted in frustration. The human recoiled from the fox's loud voice.
"No. Not like that." Whoever this human was, they were trying to avoid talking for too long.
"Huh?"
"Monsters are a species. There are two beings: Humans and Monsters." They clarified. "How do you not know what a Monster is? You are one."
Tails wondered for a moment if all the Monsters were two-tailed foxes like himself. "What does a Monster even look like?"
"They're all unique." The human quickly answered. "They look like anthropomorphic animals. But not all of them are based on animals."
Whoever this human was, they were clearly fascinated by Monsters. So fascinated in fact, that their brief moment of shyness had quickly been set aside as they talked more about Monsters.
"Oh. Well, that's interesting." Tails answered, genuinely interested in these Monsters. "But... what's with you climbing down this mountain?"
The human faced down towards the mountain's crater. "The Monsters are in there." They pointed towards it.
Tails looked at the hole again, before realising that the signals of his friends meant they were around here. He pulled out Miles Electric and ran a quick scan. All the readings were off the charts, though the closest two blips on his radar seemed to be going further away.
"It looks like my friends are down there."
The human turned to face Tails. "Are you sure that you aren't a Monster?"
"No, I'm just a fox with a birth effect that gives me two tails."
"With anthropomorphic features?" The human asked.
"Do foxes not typically have human characteristics?" Tails asked, to which the human followed up by shaking their head.
Okay, so this definitely isn't the same dimension then...
"Anyways, I need to go find my friends." He put away his handheld device. "So I'll see you later!" Before he could use his tails to fly in, the human stopped him.
"Please take me with you."
The fox looked at them. "Why? It might be unsafe for you."
"It's more unsafe for you, since you're a Monster."
Tails held back the instinct of correcting them as he was confused by their reply. "What do you mean by that?"
"Um... a Monster's SOUL is less powerful than a Human's SOUL. That's what I read about it."
"SOUL?"
"It's the very essence of your being."
Tails thought about it for a moment, thinking that it might just be an excuse they made up so that he'd take them with him. He decided to instead land back on the ground.
"Okay, prove it to me." Tails demanded.
The human's squinty eyes examined the fox for a few seconds. "Try lightly punching me." They instructed.
He was hesitant to do so, but a quick thumbs up from the human gave him the reassurance needed to do what they instructed. Tails launched his fist forward with little force as he approached them. It didn't seem to do anything.
"Okay, now will you let me lightly punch you?" The human politely asked. Tails gave them the all-clear sign.
With one step towards him, the human punched Tails in the same way that he punched them. Rather than it not doing anything however, it instead flung him backwards. He kept his balance and remained standing after the punch, but it still sent him quite a distance away from them.
He was completely awestruck by the demonstration. The human rushed over to him.
"Sorry if that hurt you..." The human apologised as they voiced their guilt.
Tails patted them on the shoulder. "Don't be. You were just proving a point, that's all." His response planted a smile on the humans face.
He looked at the human, then the hole and then back at the human again, finally settling with his choice.
"Alright, if it's what you want then I'll take you with me." The human's smile widened in glee of the fox's decision.
He got ready to start flying again. "Okay, are you ready..." He paused for a second. "What's your name?"
"Frisk."
"Okay, Frisk. Let's do this."
To be continued...
Hello! First off, I want to respond to some reviews left on the previous chapter because I haven't had the chance to yet. I usually do this via DM but I'll just write them down here for now.
jr1550434 - Don't worry, there'll be more parts coming!
Tolkam - Yeah, I wasn't sure whether or not some occasional swears would boost this story up to a T rating, so thanks for clearing that up. Also, thanks for complimenting this story by calling it a cool little gem.
VermilionC4 - I see you've started speculating about the Sonic characters mingling with the laws, mechanics and logic of Undertale. Glad to see this has got your mind running. All of that will be answered as the story progresses. Also, this will be continued! No worries.
Now that I've got that out of the way... would you readers like it if these chapters were more lengthy? I don't mind writing a ton of words since I'm enjoying reading this and heck, I only stopped at 2K words for this chapter because I felt like people would've been forgetting about this fic if it didn't get an update in a while. It always sucks when stories that have a promising premise never get past the beginning chapter.
Anyways, that's all for now! Hopefully you enjoyed reading this. Stay tuned for the next chapter.