Typewriter effect only does one line of changing then doesnt work?

The error means you are trying to index a string with Text. For example: Player.Name.Text

Correct me if I'm wrong, I'm assuming you have an object under script.Parent called Name. Name is a property which every object has. So the script thinks you are referring to the Name of the object. Instead re-name it or do :FindFirstChild("Name")

function typeWrite(object, text)
    for i = 1,#text,1 do
        object.Text = string.sub(text,1,i)
        wait(0.05)
    end
end
wait(6)
typeWrite(script.Parent.Textt,"Hello, I'm known as the Bacon Boss.")
wait(3)
typeWrite(script.Parent:FindFirstChild("Name"),"Bacon Boss")
wait(2)
typeWrite(script.Parent.Textt,"Congrats on finding me, but you'll never win.")
wait(2)
typeWrite(script.Parent:FindFirstChild("Name"),"The Game Creators")
wait(1)
typeWrite(script.Parent.Textt,"Just saying, if you win, you get to keep Not's Noob Skin.. So I'd try if I were you.")
wait(2)
typeWrite(script.Parent.Textt,"Blxefirx & Nottsbuses give you the best of luck")
wait(6)
script.Parent:TweenPosition(UDim2.new(0.5, -115,1.141, -100), "Out", "Bounce", 8, true)