Soul Mixed (Nightmare Sans x reader)

Lukielu on Tumblr

Two worlds for one soul (Nightmare sans X Reader)

Corrupted Nightmare x Brave Reader, AU Sanses x Reader Oneshots

Cross!Sans, New Undertale Fanon AU Wiki

Sans X reader oneshots []Requests open![] - Nightmare Sans X depressed reader - Wattpad

Super Powers/Heroes AU: A Great Entrance by Lilithblueflame on DeviantArt

Dead and Buried by Annie Anderson

AU sans x male reader Oneshots - My little nightmare~ - Wattpad

My Better Life (Soul Mates in Romeo, #6) by Sarah Ready

Am I The Only One Who Believes this Makes a Good Deal More Sense Than SansXToriel? : r/Undertale