So...I was thinking about the part where you name the fallen human.

Maybe,if ObjectTale was an actual game,you could change the names of characters name with your name.

Take for example you put "Chara" as your name.The characters would be named as the normal Undertale characters

-Frisk

-Toriel

-Undyne

-Papyrus

If you put "Tachara" as your name everyone would have their crossover name.

-Frisk-Cube

-Leafiel

-Pencedyne

-Penpyrus

And if you put "Taco" then everyone will have their names from the object show.

-Ice Cube

-Leafy

-Pencil

-Pen

But if you put another name(Ex:your own name)that doesn't follow any naming rules,then the names would be crossover names.

This also goes with other character names you put.ex:Bratty,Salty,or Salt.

As simple as that!