Becoming nightmare!?

What if someone from our world was transported into momma Cq as nightmare? What if a bit later after being nightmare for a while, he finds the momma Cq version of nughtmare gang as babybones/kids? What if after taking care of them for a few years, nightmare and his kids get transported into the original undertale after it malfunctions again?

(Different things happening, different beginning, ending, middles, different personalities, different everything

Especially with becoming nightmare with all of The original nightmares magic and extra