A Hot Guy And A Bunch Of Skeletons(AU Sans X Male Reader)

~Convincing Someone Is Hard~

Zenith's POV
We are now in the UnderVerse AU and I'm feel very odd for some reason...like there's something missing somewhere...

I hope that the Sans in this universe is less hostile than the others....or did I read the code wrong???

Anyways,Error went some off for a while leaving just me here. I wonder if there's a Frisk in this AU...

H-Huh?!Why is my head getting all dizzy all of a sudden???Ack!It hurts so much!

Hello. Can you hear me,Zenith?It's me,the Frisk from this universe.

W-Wha?!How did you-

Know your name and managed to get inside your mind?I had some help from Core Frisk and the Frisk from your universe. That's why Error is so persistent in destroying your brother from earlier.

I see...now I know that reason of his sudden appearance in my universe....

Listen Zenith,I need you to find Cross Sans and convince him to stop stealing codes from other AUs so he could create his universe back.

Okay,I understand but...why me? Any other Sans can stop him and I might mess with the timeline than it is now...

Hmmm...I'll find something to deal with that problem. Just find Cross in the meantime...

I could sense someone is here than just me from afar,I closed my eyes and trying find where their location is by the presence of magic in the area...

Okay...now where are you exactly hiding now...Hmmm...Ahah!Found you!

I sense Cross and Nightmare in the South side of my current location as I teleported there unnoticed.

Cross's POV
I was talking to Nightmare about taking over the AUs as Sans and the others appears in Underfell.

"So...do you know what to do now,Cross?"he asks me as I nod in response.

"Yes...I'm gonna go to Underfell and met Fell there...and I'm going to be sure that I'll get the codes from his AU."I said as I teleported away.

"......Why do I get the feeling of someone entering here. Nobody knows Cross' universe except from me and Ink...unless...there really is..."he said as Zenith already followed Cross to Underfell.

Zenith's POV
So...they're planing to get all the codes of the AUs then...I'm not gonna let them take this AU or the other AUs even if my life depends on it!

I cautiously observed him under the trees for a while as the monsters hid behind the buildings as he walks by.

When the Sans from this universe appeared in front of him,they had a small conversation and Cross seems to be mad at something as he fought with Fell.

"Oh geez,I need to act fast before he kills him and anyone else."I teleported between them as I blocked Cross' sword with my right arm to prevent from slashing into Fell.

"W-What the?!Who are you!?"Cross asked me in shock and confusion as I placed my other hand to Fell and teleported him to a safe place.

"You shouldn't be doing this,Cross. You're just being used by someone. Please stop this insanity."I tried reasoning with him as he laughed darkly.

"Why should I stop if it's getting me quite eager to continue?I'm going to get every codes in thw Multi-Verse and you can't do anything about it."he said as I sighed.

"Okay then....if convincing you isn't gonna work on you....."my eyes turned demoic like what happened the last time with Error.

"I'LL HAVE TO FIGHT YOU..."I said in a very low and dark voice as the battle starts...