Sans/Harry
One sided Flowey/Harry
MODHarry (eventually)
He can either remember restarts or can use the saves.
The night Harry is supposed to be left at the Dursleys Death wisks him away to the ruins under Mt Ebott where he is raised by Toriel.
He grows up learning their history and about the war that left the monsters trapped.
(Age anywhere from 4-7) He starts to discover his powers and meets a stranger made of shadows (death) who helps train him around the time the first child falls.
(Age anywhere from 15-18) When Frisk/Chara fall he decides to follow them either to help (pacifist route) or stop them at all costs (genocide route -Toriel gets killed in front of him)
If you are interested review. Any questions review. Decide too write it pm me or review with a link so I can read it.
What I'm trying to say is please write me a story :( cause RL is getting shitty and I don't know how to deal with it anymore.