More plot in this one, but it's also mostly Undyne fight. Hope you guys enjoy anyway.

Undyne watched with well-concealed nervousness as the human's – no, the beast's mouth split into a wicked grin at her challenge. Its eyes were a deep red. It started to step forward, but pulled its leg back and put a hand on its head, looking worried. Its eyes seemed to have changed in shade as it looked back up at her.

"What's stopping me from just running straight past you?" It called. Undyne realised she hadn't planned for that to happen, and quickly said the first thing that came to mind.

"Only cowards run away from fights!" She yelled. The beast seemed to be slightly… amused?

"Didn't you just say that you consider me a coward anyway?" It was definitely amused, Undyne could tell from its tone. That made her angry.

"Enough banter! Will you or will you not fight me?!" It shrugged.

"Well, I guess it'd be rude to decline your polite invitation." It took the step forward, still with that amused smile on its face.

"That's it, then…! No more running away! HERE I COME!" Undyne leapt at the beast from her perch, holding a magic spear pointed towards its face, and blocking the entrance to the cave that led to Hotland. There was no way she'd let this thing get near Alphys!

She drew its soul out into battle, looking at its crack distastefully before sending an arc of green magic towards it. The beast looked down at their soul, noticing it had turned green.

"En guarde!" Undyne said, and the battle really began.

*Suddenly, Frisk's POV!*

I can't move! I can't move! I can't- Frisk was panicking.

Yes, I'm aware of that. You don't need to repeat it. The Hunger replied. Anyway, it's your turn. Do something already!

Suddenly, Frisk was tossed a non-magical spear by Undyne. They held it confusedly, before looking back at Undyne.

Hurry up! Fight back or spare, I don't care! You can even check her, I'm getting bored. The Hunger asked.

Check… her?

Ugh, that's right. You have no idea what you're doing when it comes to soul fights. Frisk would've felt insulted if they weren't so busy being confused. Check as in stats. I bet you don't even know your own stats, do you? I'll explain more when we're done here, but for now all you need to know is Undyne's attack and defence. Shall I check her for you?

Uhh… okay. The Hunger checked Undyne and read out her stats to Frisk.

UNDYNE – ATK 50 DEF 20. The heroine that NEVER gives up. It paused. Oh, and by the way… I'm pretty sure that for monsters, HP is determined by ATK times DEF. So Undyne's HP is 1000. I imagine she's the toughest monster we've met so far. Now get back to the battle, your turn's over!

Frisk snapped back to reality in time to block several slow-moving magic spear-bullets with the spear they'd been given. They didn't really need to try, but they didn't want to be hit, either.

"As long as you're green, you CAN'T ESCAPE!" Undyne seemed pretty pleased about that fact. "Unless you learn to face danger head on… You won't last a SECOND against ME!"

Undyne towers threateningly. The Hunger informed Frisk. For some reason, they suddenly felt as if annoying Undyne would be a good idea. You tell Undyne her attacks are too easy. The bullets get faster. Good job, I'm proud of you.

"Haha! Then how about THIS?!" The bullets were slightly faster, and came not just from in front of Frisk, but from the sides as well.

Smells like sushi. Once again, Frisk told Undyne her attacks were too easy. The bullets get faster again.

"For years, we've dreamed of a happy ending…" The attacks were getting slightly fast, and were now coming from behind Frisk as well.

Undyne flips her spear impatiently. Frisk continued to challenge Undyne. The bullets keep getting faster.

"And now, sunlight is just within our reach!" Now, the bullets were coming from all directions and at a moderately fast pace.

The bullets are still getting faster. The Hunger said as Frisk challenged Undyne once again. It paused. Hey, you know I'm all for a good fight, but you should maybe stop challenging her… I mean, I live in this body too, you know? And it hurts when you get hit.

"I won't let you snatch it away from us!" Undyne continued her monologue, and Frisk blocked the bullets that were getting increasingly faster. "NGAHHH! Enough warming up!"

The next attack wasn't too hard, but at the end Undyne removed them from green mode and sent a proper spear towards them. It almost connected.

Oh dear. It appears she was just warming up. The Hunger sounded smug. It seems you're in trouble now. I guess you should start listening to your friends when they warn you, huh?

But Frisk had a plan. As it was their turn, and they had been removed from green mode, they decided it'd be a good time to leave. Undyne looked shocked for a second as Frisk rushed past them and through the cave they'd been blocking. They were going by too fast to look at the scenery. They were almost at the end of the cave before they were hit by another wave of green magic and were forced to stop.

"You won't get away from me this time!" Undyne sounded more annoyed as she walked back around Frisk to block the way again. The battle restarted.

She won't make the same mistake again, you know. And now she's annoyed. The Hunger warned Frisk. Oh, yeah. Back to narrating. Undyne flashes a menacing smile.

Frisk just ignored The Hunger and continued to challenge Undyne. You're just an accident waiting to happen, aren't you? Actually, more like an accident that's already happened.

"Honestly, I'm just doing you a favour…" Undyne said as Frisk blocked more bullets. "The Royal Family is powerful like you won't believe!"

Undyne points heroically towards the sky. Also, you're an idiot. Frisk had challenged Undyne again, and had barely managed to block all of the attacks as they came at them at high speeds from all directions.

You tell Undyne, once again, that her attacks are too easy… The Hunger sighs in resignation. The bullets are getting unfairly fast.

"Killing you now is an act of mercy!" Frisk was scraped once in the side, but was able to hold back on their transformation. They were starting to look panicked as they realised exactly how fast the attacks were going.

This is your own fault, you know. Oh, and… Undyne holds her fist in front of her and shakes her head.

"So STOP being so damn resilient!" Undyne had started to look quite agitated. This time, the bullets hadn't been as hard as the time before, and Frisk had managed to avoid them all again. Also, contrary to The Hunger's earlier statement, Undyne DID make the same mistake again, turning Frisk's soul red again and trying another spear attack.

Huh. I think I overestimated her intelligence. The Hunger said as Frisk rushed away again while Undyne was busy suplexing a huge boulder, just because she could.

Suddenly, when Frisk was halfway through a room with a big moving sign that said "Welcome to Hotland", their phone rang. They paused to take it out of their pocket and answer the call.

What are you even doing, you crazy child?!

It was Papyrus on the phone, obviously. "HEY! WHAT'S UP?!"

Undyne is literally RIGHT BEHIND YOU.

"I WAS JUST THINKING… YOU, ME, AND UNDYNE SHOULD ALL HANG OUT SOMETIME! I THINK YOU WOULD MAKE GREAT PALS! LET'S MEET UP AT HER HOUSE LATER!" He hung up, and as soon as Frisk had put the phone in their pocket their soul was green again.

Undyne looked furious. "You've escaped from me for the LAST time!"

Frisk didn't challenge her again, so the attack was slower. However, Undyne sent in a backwards bullet spear in her attack, which tricked Frisk and hit them in the back. They managed to not go completely beastly, although they did grow slightly and let out a growl. It seemed they were getting the hang of controlling it.

Undyne thinks of her friends and pounds the ground with her fists.

"Alphys told me humans were determined…" Another backwards spear was thrown in with the normal ones, but Frisk blocked that one too. "I see now what she meant by that!"

"But I'm determined, too!" A couple of fast normal attacks and some normal speed backwards attacks. All blocked. "Determined to end this RIGHT NOW!"

"NGAHHH! DIE ALREADY, YOU LITTLE BRAT!" Undyne once again freed Frisk from green mode. They were starting to think that it had a time restraint. She sent many normal sized spears at Frisk, but since they were red again they dodged them all easily. Then they ran again.

They entered Hotland, and were shocked still for a second when they saw Sans sleeping in his sentry station. They started moving again when they heard Undyne's stomps coming closer.

You know, she must be pretty fast to be keeping up with you. If you were a normal human, you would've been dead AGES ago.

Luckily for Frisk, as they moved along another precarious bridge (this one over lava) Undyne paused to look at Sans as well, before hastening to catch up with Frisk. However, once they reached the end of the bridge, she was starting to slow down. They turned back to look at her.

"Armour… so… hot…" She muttered. "But I can't… Give up…"

She collapsed and Frisk moved to the conveniently-placed water cooler. They grabbed a cup of water and went back to Undyne. They poured the water on her head, and after a few seconds she slowly got back up again. She looked down at Frisk for a long while, before turning around and walking back to Waterfall.

After a few seconds of silence The Hunger said, I was right. That was fun.

*Suddenly, another shift of perspective!*

"So you're telling us that you think this new human… isn't really a human? What proof do you have for that?" They said, raising one eyebrow.

"Chara, don't be rude. If Betty says she and Alphys think something's wrong with the new human, we should look into it further." Toriel scolded Chara. Betty was very clearly put out by their statement.

"Yes, of course mother. Sorry, sister." They clearly weren't sorry, but Toriel didn't seem to see that. She always saw the best in her children, adopted or not. "But, they could've just been accidentally looking at a humanoid monster. Or maybe just… watching some anime and thinking it was the camera footage."

"Yes, well, as I said, we shall look into it further. Now, I think Mettaton's show should be on soon. The others are all by the TV already. Shall we join them?" Betty cheered up when she heard the idea and headed towards the living room, but Chara scoffed.

"Mother, you know I hate Mettaton. He's so overly dramatic and weird." Toriel looked at Chara unamusedly. They conceded defeat. "Yes, alright. Fine. Family time and all that."

"Well, if it makes you feel any better my child, we might get to see the new human on this quiz show. Betty did say they were nearing Hotland." That got Chara moving to the couch in front of the TV faster, but not for a good reason. They had been waiting since they fell here for a bad human to fall. So far the monsters had been lucky, getting kind humans down in the Underground, ones that were accepted by the monsters and tolerable to Chara.

But they knew that it was only a matter of time until a human who was more… human in their nature fell down. They had been practicing their weapon and magic skills for that time. And if what Betty had said was true, they would finally be able to use them.

To be honest, they were rather excited, despite the fact that they were worrying over the repetitions.

They had never seen anything at least remotely similar to themselves down here.

It seems The Hunger's asshole-y personality is leaking over to Frisk... and it also seems it's taking Frisk's recommendation to get better at persuasion to heart. (Does it even have a heart? Who knows. I certainly don't.)

Also Chara hates everyone. What a surprise.