The monsters of highschool/undertale/HDXD

I do not own the images used and this is maybe my third HDXD but I love undertale so I decided to cross them over also I love cross sans but I modified his character to be mine a little except I don't have the red crack on his right side and his knife is actually based on the executioner blade I use a lot so hope you like my story thanks y'all

So I was a member of the Royal gaurd and I was a skeleton like my brothers sans and papyrus but I naturally created determination it made me one of the strongest monsters this was all good until a human came down and when it did I was with my brothers it attacked us but only managed to kill sans because he protected papyrus and I did everything in my power to keep him safe it was sans's last wish I kept it for as long as I could and soon it caught up to us at the last corridor and killed papyrus and I fought it and won and sealed its soul only to kill king asgore and escaping by sacrificing the human soul now I live in the surface living day by day